- OEM:
- CAT WDS (S/N: M3J1-UP)
- Off-Highway Truck/Tractor:
- 785D (S/N: DMC1-UP; MSY1-UP)
- 789D (S/N: SPD1-UP)
- 793D (S/N: FDB1-UP)
- 793F AC (S/N: EMD1-UP)
- 793F (S/N: SND1-UP; SSP1-UP; RBT1-UP)
- 795F AC (S/N: ERM1-UP)
- 797F (S/N: LAJ1-UP; WSP1-UP)
- 789D (S/N: SPD1-UP)
Introduction
The PAS rework provides information to seal the platform and prevent debris from the compartment where the components are located.
Important Safety Information
 |
Hot oil and components can cause personal injury. Do not allow hot oil or components to contact skin. |
 |
|
Accidental engine starting can cause injury or death to personnel working on the equipment. To avoid accidental engine starting, disconnect the battery cable from the negative (−) battery terminal. Completely tape all metal surfaces of the disconnected battery cable end in order to prevent contact with other metal surfaces which could activate the engine electrical system. Place a Do Not Operate tag at the Start/Stop switch location to inform personnel that the equipment is being worked on. |
|
|
Personal injury or death can occur from heavy components falling during removal or installation. Properly support the component with a suitable lifting device during removal or installation. |
|
|
Do not operate or work on this work tool unless you have read and understand the instructions and warnings in the Operation And Maintenance Manual for both the work tool and the host machine. Failure to follow the instructions or heed the warnings could result in injury or death. Contact your Caterpillar dealer for replacement manuals. Proper care is your responsibility. |
|
|
Personal injury or death can result from improper assembly procedures. Do not attempt any assembly until you have read and understand the assembly instructions. |
|
| NOTICE |
|---|
Before carrying out arc welding on the machine or on any equipment attached to the machine, disconnect all power and ground leads from the batteries in order to avoid possible damage to electronic components. |
Reference Refer to Special Instruction, REHS1841, "General Welding Procedures" anytime welding is needed.
Required Parts for Machines Equipped with the 328-1150 Platform Gp or the 347-2406 Platform Gp
| Required Parts for Machines Equipped with the 328-1150 Platform Gp or the 347-2406 Platform Gp | |||
| Item | Qty | Part Number | Description |
| 1 | 6 | 141-9203 | Screw |
| 2 | 2800 mm (110.24 inch) | 177-4122 | Seal |
| 3 | 1 | 425-0997 | Plate As |
| 4 | 6 | 8T-4121 | Hard Washer |
| 5 | 1 | N/A | Fabricated Plate |
| 6 | 4 | N/A | Fabricated Plate |
| 7 | N/A | N/A | Silicone Sealant |
Required Parts for Machines Equipped with the 360-4900 Platform Gp
| Required Parts for Machines Equipped with the 360-4900 Platform Gp | |||
| Item | Qty | Part Number | Description |
| 1 | 4 | 141-9203 | Screw |
| 2 | 2400 mm (94.49 inch) |
177-4122 | Seal |
| 3 | 1 | 425-0999 | Plate As |
| 4 | 4 | 8T-4121 | Hard Washer |
| 5 | 1 | N/A | Fabricated Plate |
| 6 | 4 | N/A | Fabricated Plate |
| 7 | N/A | N/A | Silicone Sealant |
Removal of Tread Plate
- Remove the existing tread plate as shown.
Note: Retain all hardware.
 | |
| Illustration 1 | g03423736 |
Typical view of the PAS platform | |
Rework the Powered Access Stairway
- Rework the existing plate by adding the six extra holes.
 | |
| Illustration 2 | g03383107 |
The tread plate shown applies to the machines with the 328-1150 Platform Gp or the 347-2406 Platform Gp . (A) 14 mm (0.55 inch) (B) 24 mm (0.94 inch) (C) 319 mm (12.56 inch) (D) 593 mm (23.35 inch) (E) 913 mm (35.94 inch) (F) 44 mm (1.73 inch) (G) 264 mm (10.39 inch) (H) 300 mm (11.81 inch) (J) 514 mm (20.24 inch) | |
- Rework the existing plate by adding the four extra holes.
 | |
| Illustration 3 | g03384117 |
The tread plate shown applies to the machines with the 360-4900 Platform Gp . (AA) 14 mm (0.55 inch) (BB) 24 mm (0.94 inch) (CC) 319 mm (12.56 inch) (DD) 713 mm (28.07 inch) (EE) 44 mm (1.73 inch) (FF) 264 mm (10.39 inch) (GG) 300 mm (11.81 inch) (HH) 537.5 mm (21.16 inch) | |
- Reorient the bearing blocks 90 degrees so that the grease zerks are accessible after the new plate is installed.
 | |
| Illustration 4 | g03383582 |
View of the original orientation of the grease zerk. | |
- Weld 425-0997 Plate As (3) to the platform using a continuous 3 mm (0.12 inch) fillet weld as shown above.
Note: 425-0997 Plate As (3) applies to machines with the 328-1150 Platform Gp or the 347-2406 Platform Gp .
 | |
| Illustration 5 | g03383592 |
View of 425-0997 Plate As (3) (3) 425-0997 Plate As | |
 | |
| Illustration 6 | g03383590 |
View of the continuous welded 425-0997 Plate As (3) to the platform assembly | |
- Weld 425-0999 Plate As (3) to the platform using a continuous 3 mm (0.12 inch) fillet weld as shown above.
Note: 425-0999 Plate As (3) applies to machines with the 360-4900 Platform Gp .
 | |
| Illustration 7 | g03384193 |
View of 425-0999 Plate As (3) | |
 | |
| Illustration 8 | g03384196 |
- Fabricate plate (5) as shown in the Illustrations above.
 | |
| Illustration 9 | g03386157 |
Applies to the 328-1150 Platform Gp or the 347-2406 Platform Gp (5) Fabricated plate (K) 590 mm (23.23 inch) (L) 20 mm (0.79 inch) (M) 6 mm (0.24 inch) | |
 | |
| Illustration 10 | g03386206 |
Applies to the 360-4900 Platform Gp (5) Fabricated plate (K) 390 mm (15.35 inch) (Applies to the small platform) (L) 20 mm (0.79 inch) (M) 6 mm (0.24 inch) | |
- Weld fabricated plate (5) as shown to the center vertical plate of the platform.
 | |
| Illustration 11 | g03383597 |
View B-B (5) Fabricated plate (N) 5 mm (0.20 inch) (P) 15 mm (0.60 inch) | |
- Fabricate four plates (6) as shown.
 | |
| Illustration 12 | g03383847 |
(6) Fabricated plate (R) 29.4 mm (1.16 inch) (S) 58.7 mm (2.31 inch) (T) 152.4 mm (6.0 inch) (U ) 3 mm (0.12 inch) (V) Radius of 3 ± 1 mm (0.12 ± 0.04 inch) (W) 70 degrees | |
- Position four plates (6) centered over the drain holes. Create welds as shown in Illustration 13 to secure plates (6) to the bottom of the platform.
 | |
| Illustration 13 | g03383953 |
View of the bottom of the platform. | |
- Install seal (2) around the welded plate assembly as shown.
Note: Seal (2) may need to be trimmed to fit the area.
 | |
| Illustration 14 | g03383984 |
The Illustration above shows the seal on the 328-1150 Platform Gp or the 347-2406 Platform Gp . (2) 2800 mm (110.24 inch) of 177-4122 Seal | |
Note: The Illustration above applies to machines with the 328-1150 Platform Gp or the 347-2406 Platform Gp .
 | |
| Illustration 15 | g03384211 |
The Illustration above shows the seal on the 360-4900 Platform Gp . (2) 2400 mm (94.49 inch) of 177-4122 Seal | |
Note: The Illustration above applies to machines with the 360-4900 Platform Gp .
- Apply silicone sealant (7) between seal (2) and the plate as shown. Apply the silicone completely around plate (3) .
 | |
| Illustration 16 | g03384002 |
(3) 425-0997 Plate As or 425-0999 Plate As (2) 177-4122 Seal (7) Silicone Sealant | |
- Reinstall the reworked tread plate using 10 141-9203 Screws (1) and ten 8T-4121 Hard Washers (4)
Note: Use retained hardware.
Note: The Illustration above applies to machines with the 328-1150 Platform Gp or the 347-2406 Platform Gp .
 | |
| Illustration 17 | g03384018 |
(1) 141-9203 Screws (4) 8T-4121 Hard Washers | |
