Grouser Products 450 User manual

Date 5-3-2014PN: 63-17732
12-20 (V6) Blade - 450-660
Owner’s Manual
&
Parts Book
Purchase Date
Serial Number
Model Number
Tractor Model
Dealer

2
Description Page
To The Owner, Maintenance & Safety Precautions 2-3
Angle / Tilt Function Abbreviation Key & Torque Specications & Disconnecting the Blade 4
Skid Shoe and Tilt Plate Adjustment 5
Hydraulic Instructions, Angle System & 2-Lever Angle System Operating Instructions 6
Relief Valve Instructions 7
Assembling Lift Components & Initial System Startup 8
Lift System 9
No Angle - Hydraulic Tilt System & Hydraulics 10-11
Angle Hydraulic Components 11
Quick Attach System 12-13
Hydraulic Angle - Hydraulic Tilt & Hydraulic Angle - No Tilt System 14-15
Hydraulic Angle - Hydraulic Tilt & Hydraulic Angle - No Tilt Hose Routing (Blade Side) 16-17
Hydraulic Angle - 2 Lever System Hose Routing (Blade Side) 18-19
12-20 NAHT & HAHT Blade Hydraulic Hose Routing 20
Tractor Side Hydraulic Hose Routing (Right Side) 21
Blade Assembly 22-23
NANT Blade & End Plate Assembly 24
Wire Harness 24
Blade Hydraulic Schematic 25
Hydraulic Schematic 26
2- Lever Hydraulic Schematic 27
Contact Us, Improvements, & Warranty 28
Contents
To The Owner
This manual contains information concerning the operation, adjustment, and maintenance of the 12-20 blade
assembly. You have purchased dependable, long lasting equipment, but only by proper care and operation
can you expect to receive the performance and long service built into our products. Please have all operators
read this manual carefully and keep the manual available for ready reference. If you have any questions or
concerns, contact Grouser Products.
Warning
When using the dozer blade, pay special attention to the area between the blade and the hood of the tractor.
In the right conditions, material can build up. Grouser Products is not responsible for careless operation of the
blade.

3
Safety Precautions
A careful operator is the best operator. Most accidents can be avoided by observing certain precautions. To
help prevent accidents, read and take the following precautions before operating this equipment. In addition
to these precautions, please follow all safety and operational instructions of your tractor manufacturer.
The Dozer:
1. The 12-20 Dozer should be operated only by those who are responsible and instructed to do so.
2. Read the owner’s manual carefully before using this equipment. Lack of operating knowledge can lead to
accidents.
3. Keep the dozer maintained in reliable and satisfactory condition to ensure your safety.
4. Make sure the area is clear of people before moving any equipment.
5. Do not modify or permit anyone else to modify or alter the equipment and its components without rst
consulting Grouser Products.
Servicing the Dozer:
1. Read and follow all safety instructions provided by the tractor manufacturer.
2. Always use proper personal safety gear when performing maintenance on equipment.
3. Before servicing, relieve hydraulic pressure, stop engine and fully engage parking brake.
4. Escaping hydraulic uid under pressure can penetrate skin causing serious injury. If uid is injected into
skin, obtain medical attention immediately.
– DO NOT use your hand to check for leaks. Use a piece of cardboard or paper to search for leaks.
– Stop the engine and relieve pressure before connecting or disconnecting lines.
– Tighten all connections before starting the engine or pressurizing lines.
Storing the Dozer:
1. Thoroughly clean the inside and outside of the dozer before storage. Use paint where necessary to
prevent rust.
2. Check the dozer for worn or damaged parts. Install new parts as required.
3. Lubricate all pins and joints.
Maintenance
Due to the harsh environment many of our equipment operates in, the following tasks
should be performed every 10 hours or less.
• Inspect all equipment before operation for existing or potential damages.
• Lubricate all joints with high quality grease.
• Inspect and tighten all bolts to torque specications on page 4.
• Check replaceable cutting edge for wear ensuring there is enough material to prevent permanent damage
to the blade.
• Make sure all non-rotating pins are secured properly.
• Check hydraulic cylinders and hoses for damage or leaks. For replacement parts, see hydraulic pages for
your specic system.
• Check skid shoes for wear and replace if necessary. For adjustment, see page 5.
• Inspect all tilt-ways for aggressive wear. See page 5 for tilt plate adjustment.

4
Torque Specications
All bolts should be tightened to the specications that are stated. If specications are not stated, follow torque
charts below.
Torque - Dry (ft–lbs)
SAE Grade 5 SAE Grade 8
Size UNC UNF UNC UNF
5/16 17 19 24 27
3/8 30 35 45 50
7/16 50 55 70 80
1/2 75 85 110 120
9/16 110 120 150 170
5/8 150 170 210 240
3/4 260 300 380 420
7/8 430 470 600 670
1 640 720 910 1020
Torque - Dry (ft-lbs)
Size Grade 10.9
M18 x 2.50 284
M20 x 2.50 401
M22 x 2.50 547
M24 x 3.00 694
HAHT Hydraulic Angle - Hydraulic Tilt 6-Way
HANT Hydraulic Angle - No Tilt 4-Way
NAHT No Angle - Hydraulic Tilt 4-Way
NANT No Angle - No Tilt 2-Way
Angle / Tilt Function Abbreviation Key
Disconnecting the Blade
When disconnecting the blade from the lift system, a block needs to be put under the cutting edge to provide the
proper blade angle for disconnecting the quick attach. You will need about 5-6” of height.

5
Skid Shoe and Tilt Plate Adjustment
Skid Shoe Adjustment:
1. Adjust ratchet on skid shoe mount to get skid shoe to desired
height.
2. When skid shoes are worn down, replace with new skid shoes.
Tilt Plate Adjustment:
1. Remove nuts and tilt plates.
Note: Don’t remove all of the bolts at the same time.
If you can’t easily remove the bottom tilt plates, the tilt frame will
need to be tilted further than with the cylinders. To do this follow
Steps #2-6. Otherwise continue with Step #4.
2. Remove the hose clamps behind the top of the tilt frame that
are holding the blade hoses.
3. Unattach the tilt cylinders from the blade and move out of the
way. Tilt the tilt frame all the way up on one side to get easier
access to the bottom tilt plates on the opposite side. Then tilt
the tilt frame the other direction to work with the other bottom
tilt plates.
4. Add or remove washers as needed to adjust tilt-way clearance
to have 1/16” - 1/8” of clearance in direction ‘A’ shown in
Figure 1.
5. Once the tilt-way clearance is set, tighten bolts to 640 ft-lbs.
6. If you removed the hoses clamps and unattached the cylinders,
reattach the hose clamps and cylinders.
Figure 1
Figure 2
Washers
Tilt Plate
Skid Shoe
Skid Shoe Ratchet
A

6
2-Lever Angle System Operating Instructions
If your Grouser blade was purchased with the 2-Lever Hydraulic Angle Option, you will have the
ability to angle the blade 30 degrees left or right. To achieve these angles, the two cylinders are
designed to operate independently of each other with the use of 2 tractor hydraulic control levers and
a safety relief valve. To angle the blade to the left or right, actuate the tractor hydraulic control lever
corresponding to the left or right cylinder.
The safety relief valve allows the cylinder to retract if its internal pressure becomes excessive. With
this safety feature in place, when either cylinder reaches the end of its stroke, the safety relief valve
will reroute pressure to the opposite cylinder causing it to extend. If this occurs, refer to the Relief
Valve Instructionson the next page for possible adjustments. Only one cylinder should be extended
when angled dozing.
Hydraulic Instructions
Prior to operating the blade, bleed all air out of the hydraulic system. Start with the furthest location
away from the remote until all air is out.
Hydraulic Angle System Operating Instructions
If your Grouser blade was purchased with the Hydraulic Angle Option, you will have the ability to
angle the blade 30 degrees left or right. To achieve these angles, the two cylinders are designed to
operate independently of each other through an electric diverter valve. To angle the blade to the left,
actuate the tractor hydraulic control lever in the cab with the diveter valve un-powered. To angle the
blade to the right, apply power to the diverter valve and then actuate the tractor hydraulic control lever.

7
CORRECT
(Left or RIght)
INCORRECT
Relief Valve Instructions
Set the safety relief valve at a higher pressure than tractor: To increase the pressure of the
relief valve, install a 0-5,000 psi pressure gauge into the base end of right angle cylinder (see page
26). Loosen the jam nut on the safety valve and tighten the Allen screw 1/2 turn. Next, extend the
right side cylinder out until the safety valve activates, while the safety valve is in function, record the
pressure reading on the gauge. Continue to tighten the Allen screw in 1/2 turn increments and record
the pressure until a high enough relief setting is obtained. Do not exceed the 3,000-psi operating
pressure of the cylinders. Tighten the jam nut and remove the gauge. Follow the same steps for
the left side cylinder.
Automatic lever release: In certain newer model tractors, the hydraulic control lever will automatically
release and instantly stop oil ow once the end of the stroke is reached.
CAUTION: Do not bypass the safety relief valve and plumb each cylinder to separate valves
on the tractor.
To ensure proper use and life of equipment, it is recommended to have both cylinders closed for
straight ahead dozing and only one cylinder partially or fully extended for angled dozing as shown in
the diagrams below. If the angle system is not used correctly, frame damage may occur. Some
damaged frames can be repaired, please contact Grouser Products for repair instructions if needed.
Please contact Grouser Products with any questions by:
Phone - 701-282-7710 or 800-747-6182; Fax - 701-282-8131
Unpacking Components
Unstrap and remove the lift frame, hoses, top arms, and any boxes of hardware from the undercarriage. If any
components are missing, call Grouser.

8
Assembling Lift Components
Install undercarriage per the tractor specic mounting instructions. Some assembly of Lift system components
is necessary. Follow the steps listed below. Refer to Page 9 for the correct hardware and orientation of parts.
Remove all pins on each side of the undercarriage.
Position the lift frame between the two plates on both sides of the undercarriage.
Align the lift frame to the bottom holes of the undercarriage and attach with the proper pins and hardware.
Lift the end of the cylinders up and attach to the undercarriage with the proper pins and hardware.
Attach the top arms to the top of the undercarriage with the proper pins and hardware.
Remove the male quick attaches that are in the female quicks on the blade, angle frame, or tilt frame.
Attach the male quick attaches to the lift frame and top arms with the proper pins and hardware.
Install lift cylinders and attach hoses to the cylinders. Refer to Page 10 for lift system hydraulics.
Attach the coupler mounting bracket to each top arm for Angle and Tilt connections. See pages 16-19 for
correct hardware.
Take the long hoses and attach each one to their designated tting from the coupler mount on the top arms
and also attach some to the bulkhead tee tting at the center of the undercarriage for lift. See pages 10, and
16-19 for the correct hose lengths.
Continue to route the hoses thru the tractor. Keep away from all moving parts.
Note: Installer is responsible to route hoses in a practical manner. The hoses need to be routed away
from sharp corners and moving parts and need to be secure.
If applicable, attach the wire harness to the left top arm. Hold in place with a zip tie. Run the other end of the
wire harness up into the cab of the tractor.
Locate the fused power supply. Connect the red wire to power and the black to ground. Install provided switch
into an open switch hole in the right overhead console or another convenient place in the tractor. Connect the
wire harness to the switch.
Pull the pin puller handle on the left side of the quick attach system towards the outside of the blade to open
the quick attach system. Refer to Page #12-13 for further clarication on the quick attach system.
Drive the tractor forward slowly until the top edge of the male quick attach is under the top lip of the female
quick attach already on the blade assembly.
Lift the male quick up till the blade is off the ground and the female quick attaches are against the front of the
male quick attaches.
Shut off machine and set the parking brake.
Move the pin puller handle on the left side of the blade assembly towards the center of the blade to lock the
blade in place and use the latch to the lock the handle in place. If applicable, turn up the blade stands on the
blade.
Plug the male couplers into the female couplers on the top arms. If applicable, plug the male blade break away
end of the wire harness into the female blade break away end of the wire harness on the top arm.
Initial System Startup
Start the tractor and run the blade thru all the functions. If any function does not work properly, bleeding of the
system may be required. If problem still persists, call Grouser Products.
1.
2.
3.
4.
5.
6.
7.
8.
9.
10.
11.
12.
13.
14.
15.
16.
17.
18.
19.

9
Item
No. Qty. Part No. Description
1 1 11-5025-L Top Arm - Left
2 1 11-5025-R Top Arm - Right (Revised)
3 4 16-1795 Lift Frame Grease Bolt
4 2 16-20002 1/4” x 3/4“ Hex Bolt Gr 5 NC
5 8 16-20216 3/4” x 1-1/2” Hex Bolt Gr 5 NC
6 2 16-20220 3/4” x 2-1/2” Hex Bolt Gr 5 NC
7 2 16-20227 3/4” x 4-1/2” Hex Bolt Gr 5 NC
8 10 19-13515 3/4” ID - Non Rotating Pin Spacer Bushing
9 4 19-13525 2.75 x 2.50 x 4.75 Spring Bushing
10 2 26-34738 4x20 Long Cylinder - Bushed Tube Ends (647267)
11A 1 32-14060 450 LP Lift Frame
11B 1 32-12910 660 LP Lift Frame
12 1 34-14961 Manual Canister
13 2 43-13025 Pin Weld (Lift Frame / UC)
14 2 43-5033 Pin Weld (Lift Cyl. / Lift Frame)
15 2 43-5035 Pin Weld (Lift Cyl. / UC)
16 2 43-5037 Pin Weld (Top Arm / UC)
17 2 43-5042 Pin Weld (Top Arm / QA)
18 2 43-8896 QA Bottom Pin
19 2 45-5075 450-660 Male Quick Attach
20 10 57-20747 3/4” Flat Washer
21 6 58-9369 Grease Zerk 1/8” NPT Straight
22 2 58-9371 Grease Zerk 1/8” NPT 45°
23 2 70-20610 1/4” Nyloc Hex Nut Gr 5 NC
24 4 70-20607 3/4” Hex Center Lock Nut Gr 2 NC
Lift System
NOTE: When ordering cylinder seal kits, the part number on the
cylinder is needed. The number is stamped on the base end of
the cylinder opposite of the hydraulic ports.
No. On
Cylinder Part No. Description
26-34738 49-12272 Seal Kit 4” Bore x 2” Rod (647204) Nitrided Rod
2
5
20
16
15
13
5
20
8
21
21
9
11
24
21
22
18
3
10
7
24
5
20
8
14
6
20
8
17
19
12
4
23
8
1

10
Item
No. Qty. Part No. Description
1 4 16-20128 1/2” x 2” Hex Bolt Gr 5 NC
2 4 16-35C612 3/8” x 3/4” Flanged Bolt
3 1 18-14658 NAXT Center Bracket
4 4 19-13577 NR Pin Spacer Clevis End
5 2 19-7774 1” x 1” Spring Bushing
6 2 26-34711 4 x 8 Cylinder w/ Cast Clevis Ends
7 1 32-16980 12-20 NAHT Tilt Frame
8 4 43-13580 1” Clevis Bolt In Pin
9 8 57-20744 1/2” Flat Washer
10 4 70-20604 1/2” Hex Center Lock Nut Gr 2 NC
No Angle - Hydraulic Tilt
10
9
1
2
3
4
5
6
7
8
9
(See Pages 12-13)
Quick Attach Lever System
Quick Attach (See Pages 12-13)
LIft System Hydraulics
Item
No. Qty. Part No. Description
1 2 25-34342 Tappet Quick Coupler Male - Poppet Style
2* 2 25-3457 Pioneer Dust Cap Lift (Orange)
3 2 26-34738 4x20 Long Cylinder - Bushed Tube Ends
4 2 31-34020 Bulkhead Branch Tee JIC (2703-8-8-8)
5 4 31-34040 Straight JIC X O-Ring (6400-8-8)
6 2 31-34051 Straight Thread Elbow 90° JIC x O-Ring (6801-08-10)
7A 4 35-30131 66” x 1/2” -8JIC/-8JIC Hose
7B 4 35-30134 75” x 1/2” -8JIC/-8JIC Hose
8 2 35-30160 288” x 1/2” -8JIC/-8JIC Hose
9 2 70-20807 3/4” Hex Jam Nut NF
NOTE: When ordering cylinder seal kits, the part number on the
cylinder is needed. The number is stamped on the base end of
the cylinder opposite of the hydraulic ports.
No. On
Cylinder Part No. Description
26-34738 49-12272 Seal Kit 4” Bore x 2” Rod (647204) Nitrided Rod
* Parts Not Shown
Hoses Not Drawn To Scale
Item #A for 450 and Item #B for 660 Dozer
6
6
1
Welded to front of frame
5
5
7
7
3
4
3
9
8
1