Caterpillar Cat 637G WHEEL SCRAPER (Prefix AWE) Service Repair Manual Instant Download.pdf

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Product: WHEEL SCRAPER
Model: 637G WHEEL SCRAPER AWE
Configuration: 637G WHEEL SCRAPER-COAL BOWL AWE00001-UP (MACHINE) POWERED BY 3306 Engine
Disassembly and Assembly
637G Wheel Tractor-Scraper Power Train
Media Number -RENR4074-01 Publication Date -01/04/2005 Date Updated -16/05/2005
i02310162
Transmission Hydraulic Control Valve - Disassemble
SMCS - 3073-015
Disassembly Procedure
Table 1
Required Tools
Tool Part Number Description Qty
A 1P-1853 Retaining Ring Pliers 1
Start By:
a. Remove the transmission hydraulic control valve. Refer to Disassembly and Assembly,
"Transmission Hydraulic Control Valve - Remove".
NOTICE
Care must be taken to ensure that fluids are contained during
performance of inspection, maintenance, testing, adjusting, and repair
of the product. Be prepared to collect the fluid with suitable containers
before opening any compartment or disassembling any component
containing fluids.
Refer to Special Publication, NENG2500, "Dealer Service Tool
Catalog" for tools and supplies suitable to collect and contain fluids on
Cat products.
Dispose of all fluids according to local regulations and mandates.
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https://127.0.0.1/sisweb/sisweb/techdoc/techdoc_print_page.jsp?returnurl=/sisweb/sisw...

Note: Hold each cover securely in order to contain the spring pressure when you remove the
bolts.
Illustration 1 g01096879
Personal injury can result from being struck by parts propelled by a
released spring force.
Make sure to wear all necessary protective equipment.
Follow the recommended procedure and use all recommended tooling to
release the spring force.
1. Remove bolts (3) from cover (1).
2. Remove bolts (2A) from cover (2).
3. Remove cover (1) and cover (2). Remove piston (4). Remove spool (5).
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4. Remove piston (4), spring (6), and spring (7). Remove spacers (8).
5. Remove slug (13).
6. Use Tooling (A) in order to remove retaining ring (12).
7. Remove retainer (11). Remove spring (10).
8. Remove plunger (9) from spool (5).
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9. Remove spool (14). Remove stop (15).
10. Remove spring (16).
11. Remove slug (20) and remove spool (19).
12. Remove spring (18). Remove washer (17).
13. Remove load spool (21). Remove speed spool (22).
14. If necessary, loosen locknuts (24) and remove links (23) from spools (21) and (22).
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Note: Hold the cover securely in order to contain the spring pressure when you remove the
bolts.
15. Remove bolts (25) and cover (26).
16. Remove spring (29) and spool assembly (30).
17. Use Tooling (A) to remove retaining ring (34) from spool (30).
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18. Remove retainer (33), spring (32), and plunger (31).
19. If necessary, remove dowel (27) and remove stop (28).
Copyright 1993 - 2021 Caterpillar Inc.
All Rights Reserved.
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Sun Jul 25 00:31:04 UTC+0800 2021
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i02310163
Transmission Hydraulic Control Valve - Assemble
SMCS - 3073-016
Assembly Procedure
Table 1
Required Tools
A 1P-1853 Retaining Ring Pliers 1
NOTICE
Keep all parts clean from contaminants.
Contamination of the hydraulic system with foreign material will
reduce the service life of the hydraulic system components.
To prevent contaminants from entering the hydraulic system, always
plug or cap the lines, fittings, or hoses as they are disconnected. Cover
any disassembled components and clean them properly before
assembly.
Clean the hydraulic system properly after any major component
exchange or especially after a component failure, to remove any
contamination.
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Improper assembly of parts that are spring loaded can cause bodily
injury.
To prevent possible injury, follow the established assembly procedure
and wear protective equipment.
1. If necessary, install dowel (27) and install stop (28).
2. Install retainer (33), spring (32), and plunger (31).
3. Use Tooling (A) to install retaining ring (34) onto spool (30).
4. Install spring (29) and spool assembly (30).
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injury.
Note: Hold the cover securely while you install the bolts.
5. Position cover (26). Install bolts (25). Tighten bolts (25) to a torque of 30 ± 4 N·m
(22 ± 3 lb ft).
6. If necessary, install links (23) and tighten locknuts (24) onto spools (21) and (22).
7. Install load spool (21). Install speed spool (22).
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8. Install spool (19). Install slug (20).
9. Install spring (18). Install washer (17).
10. Install spring (16).
11. Install spool (14). Install stop (15).
injury.
12. Install plunger (9) to spool (5).
13. Install spring (10). Install retainer (11).
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14. Use Tooling (A) in order to install retaining ring (12).
15. Install slug (13).
16. Install spacers (8). Install spring (6), spring (7), and spool (4).
injury.
17. Install spool (5). Install piston (4).
Note: Hold each cover securely while you tighten the bolts.
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18. Position cover (2). Install bolts (2A). Tighten bolts (2A) to a torque of 30 ± 4 N·m
(22 ± 3 lb ft).
19. Install cover (1). Install bolts (3). Tighten bolts (3) to a torque of 30 ± 4 N·m (22 ± 3 lb ft).
End By:
a. Install the transmission hydraulic control valve. Refer to Disassembly and Assembly,
"Transmission Hydraulic Control Valve - Install".
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i02304747
Transmission Hydraulic Control Valve - Install
SMCS - 3073-012
Installation Procedure
NOTICE
Contamination of the hydraulic system with foreign material will
reduce the service life of the hydraulic system components.
To prevent contaminants from entering the hydraulic system, always
plug or cap the lines, fittings, or hoses as they are disconnected. Cover
any disassembled components and clean them properly before
assembly.
Clean the hydraulic system properly after any major component
exchange or especially after a component failure, to remove any
contamination.
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1. Position priority valve (11). Connect priority valve (11) onto tubes (12). Connect priority
valve (11) onto tube (10). Tighten the shift cylinder. Install bolts (13).
2. Install selector valve (9).
3. Install manifold (8). Install plate (7).
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4. Position transmission hydraulic control valve (6).
5. Install bolts (5). Tighten bolts (5) to a torque of 30 ± 4 N·m (22 ± 3 lb ft).
6. Install the gasket.
7. Reposition harness assembly (2), harness assembly (3), and harness assembly (4) when you
install cover (1).
8. Install cover (1).
9. Refill the transmission oil. Refer to Operation and Maintenance Manual, "Lubrication
Viscocities and Refill Capacities".
End By:
a. Install the hood. Refer to the engine supplement for the scraper Disassembly and Assembly,
"Hood - Remove and Install".
Sun Jul 25 00:32:55 UTC+0800 2021
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i01659901
Drive Shaft - Remove
SMCS - 3253-011
Removal Procedure
1. Move the ejector forward.
2. Remove guard (1). Remove block (2) .
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3. Remove eight bolts (3). The bolts must be discarded. Remove drive shaft (4). The drive
shaft weighs approximately 30 kg (65 lb). Use two people in order to remove the drive
shaft.
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i01659905
Drive Shaft - Install
SMCS - 3253-012
1. Install drive shaft (4). The drive shaft weighs approximately 30 kg (65 lb). Use two people
in order to install the drive shaft. Install eight bolts (3). Bolts (3) must be replaced with new
bolts. The bolts must be torqued properly. For the proper torque, refer to Specifications,
"Drive Shaft" for the Scraper Power Train.
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2. Install block (2). Install guard (1) .
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i01655983
Axle Shaft - Remove
SMCS - 3259-011
Removal Procedure
Table 1
Required Tools
Tool Part Number Description Quantity
A 138-7575 Link Bracket 1
B 1P-7407 Eyebolt 1
NOTICE
performance of inspection, maintenance, testing, adjusting and repair
containing fluids.
Refer to Special Publication, NENG2500, "Caterpillar Tools and Shop
Products Guide" for tools and supplies suitable to collect and contain
fluids on Caterpillar products.
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1. Remove drain plug (1) in order to drain the final drive. The capacity of the final drive is
approximately 19 L (5 US gal).
2. Install Tool (A) to cover (2). Install a suitable lifting device to Tool (A). Remove the cover.
The cover weighs approximately 32 kg (70 lb).
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3. Install Tool (B) to axle shaft (3). Partially remove the axle shaft.
4. Install a suitable lifting device to axle shaft (3). Remove the axle shaft. The right axle shaft
weighs approximately 41 kg (90 lb). The left axle shaft weighs approximately 68 kg (150
lb).
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i01656019
Axle Shaft - Install
SMCS - 3259-012
Table 1
Required Tools
A 138-7575 Link Bracket 1
B 1P-7407 Eyebolt 1
NOTICE
Contaminants may cause rapid wear and shortened component life.
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1. Install a suitable lifting device to axle shaft (3). Partially install the axle shaft. The right axle
shaft weighs approximately 41 kg (90 lb). The left axle shaft weighs approximately 68 kg
(150 lb).
2. Install the axle shaft. Remove Tool (B) .
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3. Install Tool (A) to cover (2). Install a suitable lifting device to Tool (A). Install the cover.
The cover weighs approximately 32 kg (70 lb).
4. Refill the final drive. Refer to Operation and Maintenance Manual, "Capacities (Refill)".
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i01656077
Axle Shaft Guard - Remove and Install
SMCS - 7185-010
Removal Procedure
Start By:
A. Remove the left axle shaft. Refer to Disassembly and Assembly, "Axle Shaft - Remove".
NOTICE
performance of inspection, maintenance, testing, adjusting and repair
containing fluids.
Refer to Special Publication, NENG2500, "Caterpillar Tools and Shop
Products Guide" for tools and supplies suitable to collect and contain
fluids on Caterpillar products.
1. Drain the differential into a suitable container. The capacity of the differential is 12 L (3 US
gal).
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2. Disconnect the hose assembly (1). Disconnect the retainer (2). Slide the retainer toward the
differential and bevel gear.
3. Remove four bolts (3). Remove the guard.
4. Remove two O-ring seals from the tube assembly.
1. Install two O-ring seals to the tube assembly.
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2. Install the guard. Install four bolts (3) .
3. Slide the retainer toward the left axle housing. Connect the retainer (2). Connect the hose
assembly (1) .
4. Refill the differential. Refer to Operation and Maintenance Manual, "Capacities (Refil)".
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i01590210
Power Pack - Remove
SMCS - 1000-011; 3030-011
Removal Procedure
Start By:
a. Remove the hood. Refer to the engine supplement for the scraper Disassembly and
Assembly, "Hood - Remove and Install".
b. Remove the hook. Refer to machine systems Disassembly and Assembly, "Hook - Remove
and Install".
Hot engine components can cause injury from burns. Before performing
maintenance on the engine, allow the engine and the components to cool.
Fuel leaked or spilled onto hot surfaces or electrical components can
cause a fire. To help prevent possible injury, turn the start switch off
when changing fuel filters or water separator elements. Clean up fuel
spills immediately.
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NOTICE
performance of inspection, maintenance, testing, adjusting, and repair
containing fluids.
Refer to Special Publication, NENG2500, "Dealer Service Tool
Catalog" for tools and supplies suitable to collect and contain fluids on
Cat products.
1. Disconnect battery cables (1) at the batteries.
2. Remove cover (2) and two brackets (3). Remove battery cables (1) from the battery box.
3. Disconnect three plugs (4).
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4. Disconnect two plugs (7). Remove wiring harness (6) from clip (5).
5. Disconnect two plugs (8). Remove clip (9).
6. Remove cover (10).
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7. Disconnect plug (11) and pull the wiring harness through tube (12).
8. Turn fuel shutoff valve (13) to the OFF position.
9. Turn fuel shutoff valve (14) to the OFF position. Disconnect four hose assemblies (15).
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10. Attach a suitable lifting device to lifting eye assembly (16).
11. Disconnect drive shaft (17) from the transfer gears.
12. Remove clip (18). Remove two bolts (19).
13. Repeat Step 12 at each corner of the power pack.
14. Remove the power pack. The weight of the power pack is approximately 3085 kg (6800 lb).
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Sun Jul 25 00:38:30 UTC+0800 2021
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Caterpillar Cat 637G WHEEL SCRAPER (Prefix AWE) Service Repair Manual Instant Download.pdf

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