Spectra Precision — Dual Grade Laser Dozer Package
GL1425C-DozerMAXX-D1
Spectra GL1425C-DozerMAXX-D1 Dozer Laser Package with LR30W Machine Receiver and Dozer Mast
GL1425C Dual Grade Laser with LR30W Machine Receiver (Wireless In-Cab LED Display and Grade Tones via RD20), DM-20 Dozer Mast, FGC20 Heavy-Duty Fiberglass Elevator Tripod and 15’ Grade Rod — TENTHS
Retail Value: $6,637.00
$4,795.00
You Save: $1,842.00
Dual Grade Laser
LR30W Machine Receiver
RD20 Wireless In-Cab Display
Grade Tones in the Cab
DM-20 Dozer Mast Included
Rechargeable Batteries
Dozer Package
5-Year Laser Warranty
FGC20 Elevator Tripod
15 Ft Grade Rod — Tenths
► A complete one-man dozer grading system — set grade, follow grade, and push to grade without a rod man or ever leaving the seat. Everything you need to put your blade on grade from the moment you arrive on the jobsite.
The automatic self-leveling Spectra Precision® GL1425C dual grade laser is the most rugged, cost-effective laser that does three jobs—level, grade, and vertical alignment. Even in harsh jobsite conditions, the GL1425C delivers consistently reliable and accurate performance, enabling you to work faster and smarter. The GL1425C has Bluetooth built in so it can work with the Spectra Precision Laser Remote App and eliminate the cost of the remote control. The laser can be controlled with your smartphone.The rugged GL1425C laser can withstand drops of up to 3 feet onto concrete and tripod tip overs up to 5 feet. This strength, combined with full weatherproofing and dustproofing, reduces downtime and lowers repair costs over the life of the product.
The GL1425C-DozerMAXX-D1 pairs the GL1425C dual grade laser with the Spectra LR30W Machine Receiver — Spectra’s grading receiver for dozers, skid steers, scrapers and levelers — on the included DM-20 bolt-on dozer mast. The included RD20 wireless in-cab display puts grade on bright LEDs in front of the operator, with distinct high, on-grade and low tones so the operator can hear grade without taking their eyes off the blade and the terrain.
► How It Works — GL1425C-DozerMAXX-D1
1
Step 1 — Set up the laser
Mount the GL1425C on the FGC20 Elevator Tripod. Dial in your grade on both axes. The laser self-levels and begins rotating, projecting a 360° grade plane across the entire jobsite.
2
Step 2 — Mount the LR30W on the DM-20 mast
Bolt the DM-20 mast to the dozer blade — no welding. Set the blade at finished grade on a benchmark or hub stake, slide the LR30W on the mast until the on-grade LEDs light, then tighten the knobs. The RD20 wireless display mounts inside the cab.
3
Step 3 — Push to grade
Run the blade as you normally would. The LR30W reads the laser plane 360° around the machine, and its LED arrows show which way to move the blade — raise, lower or hold on grade.
4
Step 4 — Hear and see grade in the cab
The RD20 shows high, on-grade and low on bright red, green and blue LEDs at eye level, with a distinct tone for each (up to 105 dB) — so the operator can keep their eyes on the blade and the terrain.
► Why This Package Wins on the Dozer
GL1425C Dual Grade Laser
Same proven GL1425C — 4,000 ft diameter range, ±10% grade capacity, IP66 weatherproof, 5-year warranty. The workhorse of the jobsite.
Built for Dozer Grading
Spectra calls the LR30W “the correct tool for any dozer.” Three accuracy settings take you from rough grading to the finish pass on building pads and site work.
LR30W Machine Receiver
360° reception and a 6.75 in. window catch the beam from any direction. The 5-channel LED display shows which way to move the blade, and it runs about 30 hours on NiMH.
RD20 In-Cab Display with Grade Tones
Bright red, green and blue LEDs for corner-of-the-eye grading, plus distinct high, on-grade and low tones from the RD20’s built-in speaker, up to 105 dB — the LR30W on the mast has lights only. Hear grade without looking up at the mast, and change the receiver’s accuracy and LED brightness from the seat.
DM-20 Dozer Mast Included
Bolt-on 42" mast with all hardware — no welding. A permanent mast built for high-vibration hard-pan grading.
FGC20 Heavy-Duty Elevator Tripod
Crank-up elevator column goes from 40" to 90" — raise or lower the laser to put the beam in the receiver’s window on the mast, without moving the legs.
4,000’ Diameter Range
Accuracy 1/8" @ 100’
Slope Capacity ±10%
LR30W Machine Receiver
360° Reception
DM-20 Dozer Mast
FGC20 Heavy-Duty Fiberglass Elevator Tripod
15’ Grade Rod (Tenths)
Wireless In-Cab Display (RD20)
Grade Tones in the Cab
4,000’ Diameter Range
Accuracy 1/8" @ 100’
Slope Capacity ±10%
LR30W Machine Receiver
360° Reception
DM-20 Dozer Mast
FGC20 Heavy-Duty Fiberglass Elevator Tripod
15’ Grade Rod (Tenths)
Wireless In-Cab Display (RD20)
Grade Tones in the Cab
► Spectra Precision GL1425C-DozerMAXX-D1 Dozer Laser Package INCLUDES
► Component 1 — GL1425C Dual Grade Laser Transmitter
- GL1425C Dual Slope Grade Laser
- Deluxe HL760 Receiver
- Large 5" Capture Height
- Heavy Duty C70 Rod Clamp
- 105516 Vertical Adapter for HL Receiver
- Smartphone Bluetooth App Remote Control
- Free app — set grade, fine-tune slope, control laser from your phone
- RC1402N Handheld Remote Control
- Rechargeable NiMH Battery Pack B10
- Alkaline AA batteries also accepted as backup
- Battery Charger CH10
- Small Carrying Case
- Multilanguage CD, Quick User Guide and Safety Instructions
- 5-Year Laser Warranty
- LR30W Machine Receiver with Holding Clamps
- DM-20 Bulldozer Bolt-On Mount / Mast — included
- 42" mast, mounting bracket, bolts and instructions — no welding
- RD20 Wireless Remote In-Cab Display
- Distinct high, on-grade and low tones (up to 105 dB)
- Runs on 2 × AA batteries or its lighter-plug cord (powers the display, does not charge)
- Quick-disconnect mounting plate — tape, magnets or bolts
- 4 x C-Cell NiMH Rechargeable Batteries
- Alkaline C-Cell batteries also accepted as backup
- Charger 991604-99 & Charger Adapter 010542-99
- Carrying Case 010536-99 — Operators Manual for LR30W and RD20
- 2-Year Warranty
► Component 3 — FGC20 Heavy-Duty Fiberglass Elevator Tripod View Tripod Detail →
► Component 4 — 15 ft. Contractor-Grade Aluminum Rod — Feet & Tenths View Rod Detail →
►
GL1425C Dual Grade Laser — Key Specs
► Spectra LR30W Machine Receiver — INCLUDED in GL1425C-DozerMAXX-D1 Package
The LR30W is Spectra Precision’s grading receiver — built for dozers, skid steers, scrapers and levelers. Spectra calls it “the correct tool for any dozer.” On the DM-20 mast it reads the laser 360° around the machine and shows which way to move the blade to stay on grade. The included RD20 wireless in-cab display brings that grade inside the cab, with distinct high, on-grade and low tones.
LR30W Machine Receiver KEY FEATURES
- 360° reception — catches the beam from any direction as the machine turns and pushes
- 5-channel LED display — high, fine high, on-grade, fine low and low, with arrows that show which way to move the blade
- Three accuracy settings — Fine 5 mm, Standard 12 mm, Wide 32 mm: wide for rough passes, fine for the finish
- Out-of-beam indication shows which way to move to get back in the beam
- Beam averaging steadies the display in wind or at long range
- RD20 wireless in-cab display — grade LEDs and distinct high / on-grade / low tones inside the cab
- DM-20 bolt-on dozer mast included — no welding
- Longer run time — about 30 hours on NiMH (dim display), vs. 20 for the LR50W
Why the LR30W with the RD20 in-cab display?
- The receiver on the mast has lights only — the RD20 adds tones you can hear over the machine, up to 105 dB
- Keep your eyes on the blade and the terrain, not on the mast
- Change the receiver’s accuracy and LED brightness from the seat
- Moves easily from one machine to another
How the LR30W works on your machines
Dozer, scraper or leveler
Mount it on the DM-20 mast. The operator controls the blade so the receiver stays in the on-grade range — the LEDs, and the RD20 in the cab, show which way the blade needs to move.
Skid steer
Spectra lists the LR30 for skid steers and skid steers with a blade. Mount it on a mast such as the Weld-On skid steer mast (add-on below) and grade the same way.
Excavator or backhoe (grade checking)
Put the dipper arm vertical and the bucket in the same setup position for every reading. The LR30W has no plumb indicator, so plumb is judged by eye — use the MM-1 magnetic mount (add-on below). For a plumb indicator, see the LR50W.
LR30W Machine Receiver Key Specs
| Beam reception | 360° |
| Receiver range | Over 460 m (1,500 ft) radius, depending on laser power |
| Detection window height | 171 mm (6.75 in.) |
| Display channels | 5 (high, fine high, on-grade, fine low, low), plus out-of-beam indication |
| Accuracy (deadband) | Fine 5 mm (0.20 in.) · Standard 12 mm (0.45 in.) · Wide 32 mm (1.25 in.) |
| Grade mode | Center on-grade (grading) |
| Plumb and blade-tilt indicators | Not on the LR30W — see the LR50W for both |
| In-cab display | RD20 wireless in-cab display included (factory paired, not Wi-Fi) |
| Audible tones | From the RD20: High 105 dB · Medium 95 dB · Low 65 dB · Off (the receiver has no speaker) |
| Laser speed | 105 to 1,200 RPM |
| Power | 4 × C-cell NiMH rechargeable (included) or alkaline · 10–30 V DC machine power |
| Battery life (dim / bright) | NiMH 30 h / 20 h · Alkaline 40 h / 30 h (radio on) |
| Charging | About 3 hours; the receiver does not run while on the AC charger |
| Warnings | Low battery (about 90 minutes left) · Laser out of level (optional) · Auto shut-off 75 minutes after losing the beam |
| Machine control ready | CB20, CB25 and CB30 control boxes (switches from wireless to wired mode) |
| Mounting | 42–50 mm (1.66–2.00 in.) round tube or 38 mm (1.5 in.) square · DM-20 dozer mast included |
| Dimensions / weight | 343 × 142 × 149 mm (13.50 × 5.58 × 5.88 in.) · 2.7 kg (6.0 lb) with batteries |
| Operating temperature | −20°C to +60°C (−4°F to 140°F) |
| Receiver warranty | 2 years |
Specifications: Spectra Precision LR30 & LR30W User Guide, LR Series Datasheet and RD20 Hands-On Training.
► What the RD20 In-Cab Display Does from the Seat
- Corner-of-the-eye grading. Bright red, green and blue LEDs show high, on-grade and low. Standard mode shows how far off you are; battery-saver mode uses a single LED.
- Tones you can hear over the machine. The LR30W on the mast has lights only — the RD20’s built-in speaker gives distinct high, on-grade and low tones: High 105 dB, Medium 95 dB, Low 65 dB or off. Recognize grade without taking your eyes off the terrain.
- Change settings without climbing down. Set the receiver’s accuracy (fine, medium or coarse) and its LED brightness from the cab.
- Wireless, not Wi-Fi. A dedicated radio paired to the receiver at the factory, built to prevent interference when several machines work the same area. The LR30W still works on its own if the RD20 stays in the truck.
- Power and mounting. 2 × AA batteries (about 20 hours on alkaline) or the included lighter-plug cord, which powers the display but does not charge it. Mounts on the quick-disconnect plate with tape, magnets or bolts; optional RDM-1 swivel suction-cup mount.
Built for pads: Spectra positions the LR30 and LR30W for housing and commercial pads — adjustable on-grade settings match the job spec, so more pads get finished in a day.
► LR30W vs. LR50W — Which is right for your machine?
Both come with the RD20 in-cab display and tones, the 6.75 in. window and three accuracy settings. The LR30W is the dedicated grading receiver with the longer battery life; the LR50W adds blade-tilt and plumb indicators and a dig mode for excavators.
| Feature | LR30W (this kit) | LR50W (MAXX-1) |
|---|---|---|
| Built for | Dozers, skid steers, scrapers and levelers | Excavators and dozers (crossover) |
| RD20 in-cab display with tones | Included | Included |
| Blade-tilt indicator | No | Yes — receiver and RD20 |
| Plumb indicator | No — plumb by eye on an excavator | Yes |
| Grade modes | Center on-grade (grading) | Grading + dig (offset) mode |
| Accuracy settings | 5 / 12 / 32 mm | Grading 5 / 10 / 20 mm · Dig 12 / 25 / 50 mm |
| Detection window | 6.75 in. | 6.75 in. |
| Battery life, NiMH (dim / bright) | 30 h / 20 h | 20 h / 15 h |
| Mount in the kit | DM-20 dozer mast | MM-1 magnetic mount |
| Best fit | Dozer grading — pads and site work, longest run time | One receiver for the excavator and the dozer, or blade tilt for finish work |
Buying for the in-cab display and tones? This is the right kit. The RD20 must be bought with a wireless (W) receiver — the LR30, LR50 and LR60 have no wireless card and can’t be upgraded later. On a dozer, the RD20’s tones are what let the operator hear grade without looking up at the mast.
Need blade tilt, or moving between an excavator and a dozer? Step up to the MAXX-1 with the LR50W: built-in blade-tilt and plumb indicators, dig mode and the same RD20 — add the DM-20 dozer mount for the dozer.
► Spectra GL1425C Key Features and Benefits
- GL1425C is dual grade plus horizontal and vertical.
- Simple, accurate dial in grade from -10% to +15%
- Up to 4,000 ft working diameter which increases productivity by reducing need for multiple set-ups on a large job site
- Fully automatic self-leveling in both grade axis, horizontal, and vertical which provides fast, accurate setup in all applications
- Fast setup, minimal training time and automatic self-leveling minimize operating costs and boost productivity
- Highly rugged design and patented lighthouse seal protects the rotor head and glass and offers superior drop and weather protection for reduced downtime
- 2-way full function remote control allows grade changes to be made from anywhere on the jobsite
- Temperature calibrated for high accuracy over wide temperature changes
- IP66 dust and water-proof to withstand harsh jobsite conditions
- Mask mode eliminates interference from other crews on the jobsite
- Automatic Grade Match and PlaneLok
► Spectra GL1425C Applications
- Dozer and skid steer grading — building and residential pads, site work and landscaping
- Leveling concrete forms and footers
- General construction vertical alignment and plumb such as anchor bolt and form alignment
- Over the top sewer and storm drain pipe installations
- Sports fields, tennis courts and driveways
- Grading and excavating
- Steep slope road embankments and ditch banks
- Ramps and drainage
► Spectra Precision GL1425C Dual Grade Laser SPECIFICATIONS
| Leveling Accuracy | 1.5 mm/30 m | 1/16" @ 100 feet | 10 arc seconds |
| Grade Accuracy | 1/8" @ 100 feet |
| Grade Temperature Drift, typical | 1/16" @ 310 feet @ 1°F |
| Grade range no tilt adjustment | Typical 9% |
| Grade range w/ tilt adjustment | 15% |
| Rotation Speed | 300, 600, 900 RPM |
| Operational Diameter | 4,000 feet diameter |
| Laser Type | 630 - 643 nm |
| Laser Class | Class 2 |
| Self Leveling Range | Typical 5 / 8% |
| Operating Temperature | -4°F to +122°F |
| Storage Temperature | -13°F to +158°F |
| Power Source | 10,000 mAh NiMH battery pack included — or — 4 each 1.5 Volt D Alkaline Batteries (Not Included) |
| Battery Life Time NiMH | Typical 45 hours |
| Battery Charging Time | 10 hours |
| Battery Charging Temperature | +41°F to 104°F |
| Tripod Attachment | 5/8 x 11 horizontal and vertical |
| Warranty | 5 Years Laser |
| Dust and Waterproof | IP66 |
| Weight | 7.7 lbs including battery |
| Product Dimensions | 11.0 x 7.1 x 9.5 inch |
■ FGC20 ELEVATOR TRIPOD — INCLUDED IN THIS KIT
SitePro FGC20ELAZ-B Heavy-Duty Fiberglass Elevator Tripod
The FGC20 is a heavy-duty fiberglass elevator tripod built for machine receiver grade laser work. The crank-up elevator center column adjusts from 40" to a fully extended 90" — giving you an additional 50" of vertical reach without touching the legs. That lets you set the GL1425C at the height that puts the beam in the receiver’s window on the DM-20 mast, and fine-tune it without resetting the tripod. Quick-clamp leg locks and 5/8×11 thread mount for direct GL1425C compatibility.
▴ BUILD
- ✓ Heavy-duty composite legs
- ✓ Elevator center column — cranks from 40" to 90" extended
- ✓ Quick-clamp leg locks
- ✓ 5/8 × 11 thread — fits GL1425C
▴ JOBSITE READY
- ✓ Adjusts height without moving legs
- ✓ Fast setup and breakdown
- ✓ Stable on uneven ground
- ✓ Built for daily contractor use
▣
SitePro 11-815-T Aluminum 15-Foot Grade Rod — Feet & Tenths — Included in This Kit
Model: 11-815-T
The SitePro 11-815-T is a professional-grade aluminum telescoping leveling rod built for accurate elevation readings and rugged daily use. Clearly marked Feet & Tenths graduations are easy to read from a distance. Pairs perfectly with the GL1425C and its HL760 receiver.
▴ Construction
- • High-strength aluminum alloy
- • 15-foot telescoping sections
- • Feet & Tenths graduations
- • Smooth, quiet section extension
▴ On the Job
- • Reads with the HL760 rod clamp
- • Easy-read graduations at distance
- • Lightweight for all-day carry
- • Built for daily jobsite use
►
Mounting Options — Included & Available Add-Ons
✓ INCLUDED IN THIS KIT
42" bolt-on dozer mast — no welding, all hardware included
Included — $515.95 value
✓ Included in this kit
► ADD-ON — For Excavator / Backhoe Use
Magnetic mount for grade checking on an excavator or backhoe dipper arm
MSRP: $488.00
$390.00
► ADD-ON — For Skid Steer Use
For use with skid steer applications
$295.00
► GL1425C Series Package COMPARISON
GL1425C DUAL GRADE — STANDARD PACKAGES
| Part # | Components | Remote |
|---|---|---|
| GL1425C-BCC | No Receiver with Case | NO REMOTE |
| GL1425C | HL760 Deluxe Receiver with C70 Receiver Adapter Carrying Case | RC1402 + BT App |
| GL1425C-14 | CR700 Multi Use Receiver with C70 Receiver Adapter and C71 Magnetic Mount | RC1402 + BT App |
| GL1425C-BL | LASER ONLY — No Receiver — No Case | NO REMOTE |
| GL1425C-NR | HL760 Deluxe Receiver with C70 Receiver Adapter | NO REMOTE |
GL1425C DUAL GRADE — COMPLETE PACKAGES
| Part # | Includes | Remote |
|---|---|---|
| GL1425C-1 | CR700 Multi-Use Receiver • C70 Rod Adapter • C71 Magnetic Mount • Aluminum Tripod • 15’ Rod (10ths) • Large Case | RC1402 + BT App |
| GL1425C-2 | CR700 Multi-Use Receiver • C70 Rod Adapter • C71 Magnetic Mount • Aluminum Tripod • 15’ Rod (INCHES) • Large Case | RC1402 + BT App |
| GL1425C-16 | CR700 Multi-Use Receiver • C70 Rod Adapter • C71 Magnetic Mount • Standard Aluminum Tripod • 16’ Rod (10ths) • Small Case | RC1402 + BT App |
| GL1425C-17 | HL760 Premium Receiver • C70 Rod Adapter • Standard Aluminum Tripod • 16’ Rod (10ths) • Small Case | RC1402 + BT App |
| GL1425C-18 | CR700 Multi-Use Receiver • C70 Rod Adapter • C71 Magnetic Mount • Elevator Fiberglass Tripod • 16’ Rod (10ths) • Small Case | RC1402 + BT App |
| GL1425C-19 | HL760 Premium Receiver • C70 Rod Adapter • Elevator Fiberglass Tripod • 16’ Rod (10ths) • Small Case | RC1402 + BT App |
| GL1425C-26 | CR700 Multi-Use Receiver • C70 Rod Adapter • C71 Magnetic Mount • Standard Aluminum Tripod • 16’ Rod (INCHES) • Large Case | RC1402 + BT App |
| GL1425C-27 | HL760 Premium Receiver • C70 Rod Adapter • Standard Aluminum Tripod • 16’ Rod (INCHES) • Small Case | RC1402 + BT App |
| ► Dedicated Machine Receiver Packages ◄ | ||
| LR30 Series: grading receiver for dozers, skid steers and levelers (no plumb or tilt indication) | ||
| GL1425C- | GL1425C+ LR30W-DM Machine Receiver (w/ wireless in-cab display, DM-20 dozer mast) • FGC20 Heavy-Duty Fiberglass Elevator Tripod • 15’ Rod (TENTHS) | Laser: BT App + Remote Machine Receiver: RD20 In-Cab Display |
| GL1425C- | GL1425C+ LR30W-DM Machine Receiver (w/ wireless in-cab display, DM-20 dozer mast) • FGC20 Heavy-Duty Fiberglass Elevator Tripod • 15’ Rod (INCHES) | Laser: BT App + Remote Machine Receiver: RD20 In-Cab Display |
| LR50 Series: includes plumb indication for excavation and tilt for blade level indication | ||
| GL1425C- | GL1425C+ LR50W-MM Machine Receiver (w/ wireless in-cab display, mag mount) • FGC20 Heavy-Duty Fiberglass Elevator Tripod • 15’ Rod (TENTHS) | Laser: BT App + Remote Machine Receiver: RD20 In-Cab Display |
| GL1425C- | GL1425C+ LR50W-MM Machine Receiver (w/ wireless in-cab display, mag mount) • FGC20 Heavy-Duty Fiberglass Elevator Tripod • 15’ Rod (INCHES) | Laser: BT App + Remote Machine Receiver: RD20 In-Cab Display |
| GL1425C- | GL1425C+ LR50 Machine Receiver (LED bar on receiver) • FGC20 Heavy-Duty Fiberglass Elevator Tripod • 15’ Rod (TENTHS) | Laser: BT App + Remote |
| GL1425C- | GL1425C+ LR50 Machine Receiver (LED bar on receiver) • FGC20 Heavy-Duty Fiberglass Elevator Tripod • 15’ Rod (INCHES) | Laser: BT App + Remote |
| LR60 Series: includes ACE, plus tilt indication on the RD20 in-cab display (LR60W models) | ||
| GL1425C- | GL1425C+ LR60W-MM (ACE + wireless in-cab display, mag mount) • FGC20 Heavy-Duty Fiberglass Elevator Tripod • 15’ Rod (TENTHS) | Laser: BT App + Remote Machine Receiver: RD20 In-Cab Display |
| GL1425C- | GL1425C+ LR60W-MM (ACE + wireless in-cab display, mag mount) • FGC20 Heavy-Duty Fiberglass Elevator Tripod • 15’ Rod (INCHES) | Laser: BT App + Remote Machine Receiver: RD20 In-Cab Display |
| GL1425C- | GL1425C+ LR60-MM (ACE + LED display on receiver, mag mount) • FGC20 Heavy-Duty Fiberglass Elevator Tripod • 15’ Rod (TENTHS) | Laser: BT App + Remote |
| GL1425C- | GL1425C+ LR60-MM (ACE + LED display on receiver, mag mount) • FGC20 Heavy-Duty Fiberglass Elevator Tripod • 15’ Rod (INCHES) | Laser: BT App + Remote |
All part numbers include laser transmitter, NiMH rechargeable battery pack and charger.
► GRADE LASER COMPARISON CHART
| Specification | GL412N | GL422N | GL1425C | GL612N | GL622N | UL633 |
|---|---|---|---|---|---|---|
| Accuracy | 1/16-inch @ 100-ft | 10 arc seconds | |||||
| Operating Diameter | 2,600-feet | 4,000-feet | 4,000-feet | 2,600-feet | ||
| Self-Leveling Range | 5 degrees electronic servo self-leveling | 14 degrees electronic servo self-leveling | ||||
| Grade Range | -10 to +15% | -25% to +25% | ||||
| Slope Type | Single | Dual | Dual | Single | Dual | — |
| Power Source | 4 x D-Cell | NiMH Rechargeable Battery Pack | — | |||
| Battery Life | 35 Hrs NiMH | 50 Hrs Alkaline | Typical 45 Hours | 35 Hrs NiMH | 40 Hrs Alkaline | — | ||
| Rotation Speed | 300, 600 rpm | 300, 600, 900 rpm | 300, 600, 750 rpm | 0 to 750 rpm | ||
| Water Resistance | Yes — IP66 | |||||
| Size L x W x H (inches) | 10.7 x 7.7 x 7.9 | 11 x 7.1 x 9.5 | 9.4 x 5.9 x 11 | |||
| Warranty | 5-Year | |||||
► Frequently Asked Questions — GL1425C-DozerMAXX-D1 Laser Package
Does the LR30W receiver beep, or do the tones come from the RD20?
The tones come from the RD20. The LR30W on the mast shows grade on its LEDs; the RD20 in the cab has the built-in speaker, with distinct high, on-grade and low tones at High 105 dB, Medium 95 dB, Low 65 dB or off. That’s what lets a dozer operator hear grade while watching the blade and the terrain.
Can I add the RD20 in-cab display to an LR30 later?
No. The LR30 has no wireless card, so it can’t be upgraded — the same goes for the LR50 and LR60. If your goal is an in-cab display, buy the kit with the display included: this kit, with the LR30W and RD20.
What’s the difference between the LR30W and the LR50W?
Both work with the RD20 and have the 6.75 in. window. The LR30W is Spectra’s grading receiver: one center on-grade mode, accuracy of 5, 12 or 32 mm, and about 30 hours on NiMH. The LR50W adds a blade-tilt indicator, a plumb indicator and dig mode for excavators, and runs about 20 hours. For those, see the MAXX-1.
Will it work on my skid steer, backhoe or excavator?
Yes. Spectra lists the LR30 for skid steers as well as dozers, scrapers and levelers — mount it on a mast such as the Weld-On skid steer mast. On an excavator or backhoe it works as a grade checker: put the dipper arm vertical and the bucket in the same setup position each time. The LR30W has no plumb indicator, so plumb is judged by eye; mount it with the MM-1 magnetic mount. For plumb indication, see the MAXX-1; for ACE angle compensation, the ProMAXX-1.
How do I install the DM-20 dozer mast?
The DM-20 bolts to the blade with the included bracket and hardware — no welding, and no drilling or tapping on Trimble Ready machines. It fits most dozer blades and pivots so the mast can be set plumb. Set the blade at finished grade, slide the receiver on the mast until the on-grade LEDs light, and tighten the knobs. The receiver and mast can sit higher than the machine, so watch for overhead lines and remove them for transport.
Which accuracy setting should I use?
Wide (32 mm / 1.25 in.) for rough grading and first passes, Fine (5 mm / 0.20 in.) for the finish pass. Standard (12 mm / 0.45 in.) is the factory setting. You can change it on the receiver or from the RD20 in the cab.
Does it work with my rotating laser?
The LR30W works with nearly all rotating lasers and reads both visible and invisible beams, at 105 to 1,200 RPM. The GL1425C in this kit (300, 600 or 900 RPM) is fully compatible.
How long do the batteries last, and can it run on machine power?
On the included NiMH batteries the LR30W runs about 30 hours (20 on bright), or 40 hours on alkaline C-cells, with the radio on. A full charge takes about 3 hours, and the receiver doesn’t run while it’s on the AC charger. It can also run on 10–30 V DC machine power. The RD20 runs on 2 AA batteries (about 20 hours) or its own lighter-plug cord, which powers it but does not charge. The receiver warns with about 90 minutes left and shuts off 75 minutes after losing the beam.
Can I use the LR30W without the RD20?
Yes. The LR30W works as a stand-alone receiver with its own LED display. If it was paired and the RD20 is off, cycle the receiver’s power to clear the lost-link signal.
► Spectra Precision GL1425C Dual Grade Laser DOWNLOADS
▼ GL1425C Datasheet
▼ GL1425C User Guide
▼ GL1425C Hands-On Training
▼ LR30 / LR30W User Guide
▼ LR Series Datasheet
▼ LR30W / RD20 Hands-On Training
► The LR30W on Dozers and Skid Steers
► Watch: LR Machine Receiver Grading Setup on a Bulldozer
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Comprehensive training guide for the Spectra Precision GL1425C...
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