Improved Hydraulic Fan Filter Housing Is Now Available for Certain 834K Wheel Dozers, 836K Compactors and 988K Wheel Loaders {1408, 1435, 5057, 5068} Caterpillar

Landfill Compactor

836K (S/N: LWZ1-231; TWZ1-616)

Wheel Dozer

834K (S/N: LWY1-744; TWY1-707)

Wheel Loader

988K (S/N: LWX1-747; TWX1-1196)

Description Of Change: An improved hydraulic fan filter housing is now used on products listed above. The improved hydraulic fan filter housing is devised to eliminate triggering of early bypassing event code until optimum usage of the filter. This ensures efficient usage of the filter and reduces the service cost.

Adaptable To: The improved hydraulic fan filter housing is adaptable to the products within the listed serial numbers, and is effective with all products after the listed serial numbers.

Rework Procedure for Replacing Oil Filter Group on 834K Wheel Dozers

1. Disconnect the existing hoses, harness and tubes from the former filter before replacing the filter.
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   Illustration 1	g06194951
   (A) Hydraulic pressure sensor switch (1) 528-8949 Bracket (2) 7X-2470 Adapter (3) 2S-4078 O-Ring Seal (4) 4P-7429 Clip (5) 7K-1181 Cable Strap (6) 416-8308 Oil Filter Gp

2. Replace the former 345-3969 Bracket with new bracket (1).

3. Install the bracket by letting it to hang on the slotted holes.

4. Incase of mounting the former filter to new bracket (1), the bracket (1) should be pushed higher in slotted holes and installed.

5. Replace the former 115-2129 Oil Filter Gp with improved oil filter group (6) and secure it to bracket (1) as shown in Illustration 1.

6. Install two adapters (2) with two O-ring seal (3) on both side of the oil filter group (6) as shown in Illustration 1.

7. Secure clip (4) and cable strap (5) arrangement to bracket (1) as shown in Illustration 1.

8. Route the hydraulic pressure sensor switch (A) through clip (4) and cable strap (5) arrangement as shown in Illustration 1.
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   Illustration 2	g06195426
   (A) Hydraulic pressure sensor switch (B) Tank wiring group (1) 528-8949 Bracket (2) 7X-2470 Adapter (3) 2S-4078 O-Ring Seal (4) 4P-7429 Clip (5) 7K-1181 Cable Strap (6) 416-8308 Oil Filter Gp

9. Connect the hydraulic pressure sensor switch (A) to the tank wiring group (B) as shown in Illustration 2.
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   Illustration 3	g06195430
   (A) Hydraulic pressure sensor switch (B) Tank wiring group (1) 528-8949 Bracket (2) 7X-2470 Adapter (3) 2S-4078 O-Ring Seal (4) 4P-7429 Clip (5) 7K-1181 Cable Strap (6) 416-8308 Oil Filter Gp

10. Connect the existing hoses, harness and tubes that were disconnected in Step 1 as shown in Illustration 3.

Rework Procedure for Replacing Oil Filter Group on 836K Compactors

1. Disconnect the existing hoses, harness and tubes from the former filter before replacing the filter.
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   Illustration 4	g06195440
   (A) Hydraulic pressure sensor switch (B) Hose (1) 528-8948 Bracket (2) 7K-1181 Cable Strap (3) 4P-8134 Clip (4) 7X-2470 Adapter (5) 2S-4078 O-Ring Seal (6) 528-8947 Hose As (7) 416-8308 Oil Filter Gp

2. Replace former 427-1207 Bracket new bracket (1).

3. Replace former 115-2129 Oil Filter Gp with improved oil filter group (7) and secure it to bracket (1) as shown in Illustration 4.

4. Install two adapters (4) with two O-ring seals (5) on both sides of the oil filter group (7) as shown in Illustration 4.

5. Replace former 375-1448 Hose As with new hose assembly (6) as shown in Illustration 4. Adjust the orientation of hose (B) to avoid any interference.

6. Secure the clip (3) and cable strap (2) arrangement to bracket (1) as shown in Illustration 4.

7. Route the hydraulic pressure sensor switch (A) through clip (3) and cable strap (2) arrangement as shown in Illustration 4.
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   Illustration 5	g06195444
   (A) Hydraulic pressure sensor switch (B) Hose (C) Tank wiring group (1) 528-8948 Bracket (2) 7K-1181 Cable Strap (3) 4P-8134 Clip (4) 7X-2470 Adapter (5) 2S-4078 O-Ring Seal (6) 528-8947 Hose As (7) 416-8308 Oil Filter Gp

8. Connect the hydraulic pressure sensor switch (A) to tank wiring group (B) as shown in Illustration 5.
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   Illustration 6	g06195445

9. Connect the existing hoses, harness and tubes that were disconnected in Step 1 as shown in Illustration 6.

Rework Procedure for Replacing Oil Filter Group on 988K Wheel Loaders

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Illustration 7	g06196033
(A) 2 Slots of length 14 mm (0.5 inch), width 16.6 mm (0.65 inch) and arc length 11.4 mm (0.44 inch) (B) 21.3 ± 1.5 mm (0.83 ± 0.05 inch) (C) 21.3 ± 1.5 mm (0.83 ± 0.05 inch) (D) 20.0 ± 1.5 mm (0.78 ± 0.05 inch) (E) 160 mm (6.2 inch) (G) 4 holes of diameter 11 mm (0.4 inch)

1. Modify the 427-1220 Bracket as per dimension (A), dimension (B), dimension (C), dimension (D), dimension (E) and dimension (G) given in Illustration 7.

2. Disconnect the existing hoses, harness and tubes from the former filter before replacing the filter.
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   Illustration 8	g06196295
   (J) Tank wiring group (K) Hydraulic pressure sensor switch (1) 7K-1181 Cable Strap (2) 427-1220 Bracket (3) 132-5789 Clip (4) 2S-4078 O-Ring Seal (5) 7X-2470 Adapter (6) 416-8308 Oil Filter Gp

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   Illustration 9	g06196300
   (K) Hydraulic pressure sensor switch (1) 7K-1181 Cable Strap (2) 427-1220 Bracket (3) 132-5789 Clip (4) 2S-4078 O-Ring Seal (5) 7X-2470 Adapter (6) 416-8308 Oil Filter Gp

3. Replace the former 115-2129 Oil Filter Gp with improved oil filter group (6) and secure it to bracket (2) as shown in Illustration 8 and Illustration 9.

4. Install two adapters (5) with two O-ring seals (4) on both sides of oil filter group (6) as shown in Illustration 8.

5. Install the clip (3) and cable strap (1) arrangement to the bracket as shown in Illustration 8 and Illustration 9.

6. Route the hydraulic pressure sensor switch (K) through clip (3) and cable strap (1) arrangement as shown in Illustration 8 and Illustration 9.
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   Illustration 10	g06196302
   (2) 427-1220 Bracket (4) 2S-4078 O-Ring Seal (5) 7X-2470 Adapter

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   Illustration 11	g06196304
   (J) Tank wiring group (K) Hydraulic pressure sensor switch (1) 7K-1181 Cable Strap (2) 427-1220 Bracket (3) 132-5789 Clip (4) 2S-4078 O-Ring Seal (5) 7X-2470 Adapter (6) 416-8308 Oil Filter Gp

7. Connect the existing hoses, harness and tubes to the oil filter group which were removed in Step 2 as shown in Illustration 10 and Illustration 11.

Note: The new improved filter group is also adoptable to machines equipped with ecosafe hydraulic oil or arctic oil.