- Load Haul Dump (LHD):
- R1300 (PIN: 6QW)
Reference: Maintenance Manual, RENR4700 (1DE0603), "Machine Repairs & Welding Procedures".
Reference: Systems Operation, Testing and Adjusting, RENR4606, "R1300 L.H.D. Steering System", "Steering Secondary Lockout Test".
Description of Change: A new enclosed cab door latch is now available.
The new door latch will improve the service life of the enclosed cab door.
Adaptable To: The new door latch is adaptable to R1300 (PIN: 6QW1-UP). Refer to the procedure below in order to adapt earlier machines.
| Required Parts | ||
| Qty | Part Number | Description |
| 1 | 9EL4475 | Chain Link |
| 1 | 9EP6864 | Latch |
| 2 | 6DE2743 | Tapping Block |
| 5 | 5S-7379 | Bolt |
| 5 | 8T-4896 | Hard Washer |
| 1 | 9EP6020 | Handle |
| 1 | 9EP7092 | Handle |
| 1 | 8F-2667 | Key |
| 3 | 1A-0302 | Spring |
| 1 | 5S-7383 | Bolt |
| 1 | 9EP7234 | Armrest |
| 1 | 9EP7089 | Cover |
| 4 | 8T-4224 | Hard Washer |
| 2 | 8C-3121 | Bolt |
| 2 | 6V-8918 | Bolt |
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Personal injury or death can result from sudden machine movement. Sudden movement of the machine can cause injury to persons on or near the machine. Prevent possible injury by performing the procedure that follows before working on the machine. |
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Personal injury can result from hydraulic oil pressure and hot oil. Hydraulic oil pressure can remain in the hydraulic system after the engine has been stopped. Serious injury can be caused if this pressure is not released before any service is done on the hydraulic system. Make sure all of the work tools have been lowered to the ground, and the oil is cool before removing any components or lines. Remove the oil filler cap only when the engine is stopped, and the filler cap is cool enough to touch with your bare hand. |
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| NOTICE |
|---|
Care must be taken to ensure that fluids are contained during performance of inspection, maintenance, testing, adjusting and repair of the machine. Be prepared to collect the fluid with suitable containers before opening any compartment or disassembling any component containing fluids. Refer to Special Publication, NENG2500, "Caterpillar Tools and Shop Products Guide", for tools and supplies suitable to collect and contain fluids in Caterpillar machines. Dispose of all fluids according to local regulations and mandates. |
| NOTICE |
|---|
Protect the dash, the exposed lining, and other components from heat and sparks generated by welding. |
Procedure
- Install the steering frame lock pin.
- Depress the relief valve for the vacuum breaker on the hydraulic tank in order to release any pressure in the hydraulic tank.
- Remove the following items from the door: the shoulder pad, the armrest, the grab handle, the cover for the door latch, the door latch, the covers for the pilot control valve and the cover for the wiring harness.
- Remove the pilot control valve. Disconnect the hoses and the wiring from the door.
- Remove the door.
- Refer to Illustration 1. Fabricate an 8 mm plate from mild steel.
 | |
| Illustration 1 | g00718747 |
(A) 104 mm (4.0 inch) (B) 115 mm (4.5 inch) (C) Radius 9 mm (0.35 inch) | |
- Refer to Illustration 2. Modify the door. Remove the areas (D) that are marked. Weld the new plate (E) to the existing opening for the door latch.
 | |
| Illustration 2 | g00730526 |
(D) Remove the areas that are marked. (E) Location of new plate | |
- Refer to Illustration 2. Modify the existing 9EL5368 Mounting Bracket for the STIC steer valve. Remove the spring lug (F). Remove the backing plate (G) .
 | |
| Illustration 3 | g00718749 |
(F) Spring lug (G) Backing plate | |
 | |
| Illustration 4 | g00730531 |
Refer to Table 2 for the dimensions that are shown in Illustration 4. | |
| Dimensions that are Needed in order to Modify the Door | |
| Item | Dimension |
| 1 | 9EL4475 Chain Link |
| 2 | 9EL5368 Mounting Bracket |
| 3 | 6DE2743 Tapping Block |
| H | 62 mm (2.44 inch) |
| J | 77 mm (6.97 inch) |
| K | 150 mm (5.9 inch) |
| M | Drill five holes. 11.1 mm (0.43 inch) Diameter |
| N | 537 mm (21.14 inch) |
| P | 482.8 mm (19.0 inch) |
| R | 464.8 mm (18.23 inch) |
| S | 450 mm (17.72 inch) |
| T | 430 mm (16.93 inch) |
| U | Drill one hole. 55 mm (2.16 inch) Diameter |
| V | 83.9 mm (3.3 inch) |
| W | 179.9 mm (7.08 inch) |
| X | 215.5 mm (8.48 inch) |
| Y | 243.9 mm (9.6 inch) |
| Z | 250.9 mm (9.87 inch) |
| AA | 433.4 mm (17.06 inch) |
| BB | 460.9 mm (18.14 inch) |
| CC | 331 mm (13.03 inch) |
| DD | 445 mm (17.52 inch) |
- Refer to Illustration 4. Modify the door. Weld 9EL4475 Chain Link (1) to the door. Weld the modified 9EL5368 Mounting Bracket (2) to the door. Weld two 6DE2743 Tapping Blocks (3) to the door. Drill five holes (M). Drill one hole (U) .
- Remove 6V-1155 Striker Assembly from the cab.
 | |
| Illustration 5 | g00718754 |
(4) Plate (5) Mount for the striker (GG) 460 mm (18.11 inch) (HH) 16 mm (0.63 inch) (JJ) 20 mm (0.78 inch) (KK) 50 mm (1.97 inch) (LL) Grind away the area that is marked. (MM) 5 mm (0.19 inch) | |
- Remove the mount for the striker (5) from the cab by grinding the mount (5) for the striker off of the cab. Refer to Illustration 5.
- Grind away an area (LL) of the gusset from the cab. Refer to Illustration 5.
- Use the following dimensions in order to fabricate plate (4) from mild steel: 20 mm (0.78 inch) (JJ), 16 mm (0.63 inch) (HH) and 50 mm (1.97 inch). Weld plate (4) so that plate (4) is flush with the door opening. Refer to Illustration 5.
- Refer to Illustration 6. Modify the 9EP1348 Cover. Remove the area (D) that is marked. Drill one hole (K) .
 | |
| Illustration 6 | g00718755 |
9EP1348 Cover (D) Remove the area that is marked. (K) Drill one hole. 11.1 mm (0.44 inch) Diameter (NN) 9.5 mm (0.37 inch) (PP) 99.5 mm (3.92 inch) (RR) 26 mm (1.02 inch) | |
- Refer to Illustration 7. Modify the 9EP0336 Cover. Remove the area (D) that is marked. Drill one hole (K) .
 | |
| Illustration 7 | g00718756 |
9EP0336 Cover (D) Remove the area that is marked. (K) Drill one hole. 11.1 mm (0.44 inch) Diameter (JJ) 20 mm (0.78 inch) (KK) 50 mm (1.97 inch) (NN) 9.5 mm (0.37 inch) (SS) 21 mm (0.83 inch) (UU) Radius 12.5 mm (0.49 inch) | |
- Refer to Illustration 8. Modify 9EP1349 Cover. Remove the tag (WW). Remove the area (D) that is marked. Drill two holes (K) .
 | |
| Illustration 8 | g00718758 |
9EP1349 Cover (D) Remove the area that is marked. (K) Drill two holes. 11.1 mm (0.44 inch) Diameter (NN) 9.5 mm (0.37 inch) (RR) 26 mm (1.02 inch) (TT) 69 mm (2.72 inch) (VV) 169 mm (6.65 inch) (WW) Remove the tag. | |
- Install the door to the cab.
- Use five 5S-7379 Bolts (13) and five 8T-4896 Hard Washer (14) in order to install the 9EP6864 Latch (12) to the door. Refer to Illustration 9.
 | |
| Illustration 9 | g00730533 |
(6) 8T-3985 Knob (7) 9EP7092 Handle (8) 9EP7089 Cover (9) 9EP7234 Armrest (10) 8C-3121 Bolt (11) 8T-4224 Hard Washer (12) 9EP6864 Latch (13) 5S-7379 Bolt (14) 8T-4896 Hard Washer (15) 1A-0302 Spring (16) 5S-7383 Bolt (17) 8F-2667 Key | |
- Install 9EP6020 Handle. The 9EP-6020 Handle is located on the outside of the door.
- Install the following items: 9EP7092 Handle (7), 8F-2667 Key (17), 1A-0302 Spring (15), 5S-7383 Bolt (16) and 8T-4896 Hard Washer (14) .
- Install the 8T-3985 Knob (6) to the 9EP7092 Handle (7) .
- Use two 8C-3121 Bolts (10) and two 8T-4224 Hard Washers (11) in order to install the 9EP7234 Armrest (9) to the 9EP7089 Cover (8). Use two 6V-8918 Bolts and two 8T-4224 Hard Washers (11) in order to install the assembly to the 9EP6864 Latch (12) .
- Install the following items: the pilot control valve, the hoses and the wiring harness.
- Install the cover over the wiring harness.
- Install the shoulder pad and the grab handle.
- Install the following modified items to the steering pilot valve: 9EP1348 Cover, 9EP1349 Cover and 9EP0336 Cover .
- Test the steering neutralizer system in order to check the system for correct operation. Refer to Systems Operation, Testing and Adjusting, RENR4606 (9EL9605), "R1300 L.H.D. Steering System", "Steering Secondary Lockout Test".