Caterpillar Cat 420E BACKHOE LOADER (Prefix PRA) Service Repair Manual (PRA00001 and up).pdf

Service Repair Manual
Model
420E BACKHOE LOADER

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Product: BACKHOE LOADER
Model: 420E BACKHOE LOADER PRA
Configuration: 420E Backhoe Loader Single Tilt PRA00001-UP (MACHINE) POWERED BY C4.4 Engine
Disassembly and Assembly
416E, 420E and 430E Backhoe Loaders Power Train
Media Number -KENR7651-05 Publication Date -01/05/2014 Date Updated -20/05/2014
i03879208
Tire and Rim (Front) - Remove and Install
SMCS - 4202-010-FR
Removal Procedure
Table 1
Required Tools
Tool Part Number Part Description Qty
A 1U-9745 Air/Hydraulic Jack Gp 1
B 308-3471 Jack Stand Gp 2
Illustration 1 g01237930
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420E Backhoe Loader Single Tilt PRA00001-UP (MACHINE) POWERED BY C4.4 ...
2019/9/14
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1. Raise the bucket. Install cylinder lock (1).
2. Remove nuts (3) and fender (2). Place suitable cribbing (4) between the front axle and the
frame on each side of the machine. This will keep the front axle from oscillating.
3. Loosen lug nuts (5). Do not remove lug nuts (5) at this time.
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4. Use Tooling (A) in order to raise the machine. Position Tooling (B) under the frame of the
machine. Use Tooling (A) in order to lower the machine onto Tooling (B).
5. Attach a suitable lifting device to the tire and rim (6). The combined weight of the tire and
rim (6) is approximately 70 kg (155 lb). Remove lug nuts (5) and remove the tire and rim
(6).
Installation Procedure
Table 2
Required Tools
A 1U-9745 Air/Hydraulic Jack Gp 1
B 308-3471 Jack Stand Gp 2
C 222-3123 Penetrating Oil 1
1. Attach a suitable lifting device to the tire and rim (6). The combined weight of the tire and
rim (6) is approximately 70 kg (155 lb). Install the tire and rim (6).
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Note: Ensure that all of the studs and lug nuts (5) are clean and dry.
2. Apply one drop of Tooling (C) to the threads of lug nuts (5). Install lug nuts (5). Do not
tighten lug nuts (5) at this time.
3. Use Tooling (A) in order to raise the machine. Remove Tooling (B) from the frame of the
machine. Use Tooling (A) in order to lower the machine onto the ground.
4. Install fender (2) and nuts (3). Remove suitable cribbing (4).
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5. Tighten lug nuts (5) to a torque of 190 ± 40 N·m (140 ± 30 lb ft). Then, turn lug nuts (5) by
an additional 60° ± 5°.
6. Remove cylinder lock (1). Lower the bucket to the ground.
Copyright 1993 - 2019 Caterpillar Inc.
All Rights Reserved.
Private Network For SIS Licensees.
Sat Sep 14 21:23:11 UTC+0800 2019
5/5
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i02993849
Tie Rod (Steering)(Front) - Remove and Install
SMCS - 4318-010-ZH; 4318-010
Removal Procedure
Table 1
Required Tools
A 1P-2320 Combination Puller 1
Start By:
a. Remove the front tires and rims. Refer to Disassembly and Assembly, "Tire and Rim (Front)
-Remove and Install".
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1. Loosen nut (1) from tie rod (2).
2. Loosen nut (3).
3. Use Tooling (A) in order to disconnect tie rod (2). Remove nut (1) and remove tie rod (2).
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1. Install tie rod (2).
2. Install nut (1). Tighten nut (1) to a torque of 220 + 11, − 33 N·m (162 + 8, − 24 lb ft).
3. Tighten nut (3) to a torque of 250 + 12, − 37 N·m (184 + 9, − 27 lb ft).
End By:
a. Install the front tires and rims. Refer to Disassembly and Assembly, "Tire and Rim (Front) -
Remove and Install".
Sat Sep 14 21:23:58 UTC+0800 2019
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i02997884
Steering Cylinder (Front) - Remove and Install
SMCS - 4303-010-FR
Removal Procedure
Start By:
a. Remove the front axle. Refer to Disassembly and Assembly, "Drive and Steering Axle
(Front) - Remove".
b. Remove both tie rods. Refer to Disassembly and Assembly, "Tie Rod (Steering) (Front) -
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1. Remove bolts (1) and remove steering cylinder (2).
Table 1
Required Tools
A 155-0695 Thread Lock Compound 1
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1. Install steering cylinder (2). Apply Tooling (A) to the threads of bolts (1). Install bolts (1).
Tighten bolts (1) to a torque of 460 ± 23, − 69 N·m (340 + 17, − 51 lb ft).
End By:
a. Install both tie rods. Refer to Disassembly and Assembly, "Tie Rod (Steering) (Front) -
b. Install the front axle. Refer to Disassembly and Assembly, "Drive and Steering Axle (Front)
- Install".
Sat Sep 14 21:24:46 UTC+0800 2019
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i02106590
Final Drive Planetary - Remove
SMCS - 4050-011; 4084-011
Removal Procedure
Start By:
a. Remove the wheel and tire. Refer to Disassembly and Assembly, "Wheel and Tire - Remove
and Install".
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, "Caterpillar Tools and Shop
Products Guide" for tools and supplies suitable to collect and contain
fluids on Caterpillar products.
Dispose of all fluids according to local regulations and mandates.
1. Drain the oil from the final drive planetary into a suitable container for storage or disposal.
Refer to Operation and Maintenance Manual, "Final Drive Planetary (Axle) Oil - Change".
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2. Remove screws (2) and remove planetary carrier assembly (3) from wheel flange (1).
Sat Sep 14 21:25:34 UTC+0800 2019
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i02997899
Final Drive Planetary - Disassemble
SMCS - 4050-015; 4084-015
Disassembly Procedure
Table 1
Required Tools
A 1P-1863 Retaining Ring Pliers 1
Start By:
a. Remove the final drive planetary. Refer to Disassembly and Assembly, "Final Drive
Planetary - Remove".
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1. Use Tooling (A) and remove retaining ring (1). Remove thrust washer (2), lock rings (3),
thrust washers (4), bearing (5) and planetary gear (6).
2. Repeat Step 1 for the remaining planetary gear assemblies.
Sat Sep 14 21:26:21 UTC+0800 2019
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i06002581
Final Drive Planetary - Assemble
SMCS - 4050-016; 4084-016
Assembly Procedure
Table 1
Required Tools
A 1P-1863 Retaining Ring Pliers 1
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Note: Position the taper (X) of bearing (5) as shown.
1. Position planetary gear (6) on a flat surface. Install one thrust washer (4) and one locking
ring (3) . Install bearing (5) into planetary gear (6) . Install the remaining thrust washer (4)
and the remaining locking ring (3) . Install planetary gear (6) and the components into the
planetary carrier assembly. Install thrust washer (2) . Use Tooling (A) and install retaining
ring (1) .
2. Repeat Step 1 for the remaining planetary gear assemblies.
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End By: Install the final drive planetary. Refer to Disassembly and Assembly, "Final Drive
Planetary - Install".
Sat Sep 14 21:27:09 UTC+0800 2019
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i02110388
Final Drive Planetary - Install
SMCS - 4050-012; 4084-012
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1. Position planetary carrier assembly (3) onto wheel flange (1). Install screws (2). Tighten
screws (2) to a torque of 25 N·m (18 lb ft).
2. Fill the final drive planetary with oil. Refer to Operation and Maintenance Manual,
"Capacities (Refill)" and refer to Operation and Maintenance Manual, "Final Drive
Planetary (Axle) Oil - Change".
End By:
a. Install the wheel and the tire. Refer to Disassembly and Assembly, "Wheel and Tire -
Sat Sep 14 21:27:57 UTC+0800 2019
2/2
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i04818786
Drive Shaft (Front) - Remove and Install
SMCS - 3253-010-FR
Removal Procedure
Table 1
Required Tools
A 1U-7505 Hydraulic Jack 1
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1. Install Tooling (A) under guard (2) . Remove bolts (1) . Repeat for the other side. Use
Tooling (A) in order to lower guard (2) to the ground. The weight of guard (2) is
approximately 38 kg (85 lb).
2. Remove bolts (3) .
3. Remove bolts (5) and remove front drive shaft (4) .
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Table 2
Required Tools
A 1U-7505 Hydraulic Jack 1
1. Install front drive shaft (4) and install new bolts (5) . Tighten bolts (5) to a torque of 28 ± 7
N·m (21 ± 5 lb ft)
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2. Install new bolts (3) .
3. Install Tooling (A) under guard (2) . The weight of guard (2) is approximately 38 kg (85 lb).
Use Tooling (A) in order to raise guard (2) into position. Install bolts (1) . Repeat for the
other side.
Sat Sep 14 21:28:45 UTC+0800 2019
4/4
2019/9/14

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i02990373
Drive and Steering Axle (Front) - Remove
SMCS - 3020-011-FR
Removal Procedure
Table 1
Required Tools
A 308-3470 Repair Stand 2
B 308-3471 Repair Stand 2
C 1U-9745 Air/Hydraulic Jack Gp 1
Start By:
a. Remove the front drive shaft. Refer to Disassembly and Assembly, "Drive Shaft (Front) -
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1. Raise the bucket and install lift cylinder brace (1).
2. Use Tooling (C) in order to position Tooling (A) under the rear of the machine.
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3. Use Tooling (C) in order to raise the front of the machine. Position Tooling (B) under the
front of the machine.
4. Remove the front tires and rims. Refer to Disassembly and Assembly, "Tire and Rim (Front)
- Remove and Install".
5. Remove the counterweight. Refer to Disassembly and Assembly, "Counterweight - Remove
and Install".
6. Disconnect hose assembly (2). Repeat for the opposite side of the machine.
7. Remove bolt (3).
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