D250E Series II and D300E Series II Articulated Trucks Machine Systems Caterpillar

Removal Procedure

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At operating temperature, the hydraulic tank is hot and under pressure. Hot oil and components can cause personal injury. Do not allow hot oil or components to contact skin. Remove the filler cap only when the engine is stopped, and the filler cap is cool enough to touch with your bare hand. Remove the filler cap slowly in order to relieve pressure.

Note: Turn off the engine. Apply the foot brake several times in order to relieve the pressure in the brake system.

1. Put identification marks on all lines, hoses, wires and tubes for installation purposes. Plug all lines, hoses and tubes. This helps prevent fluid loss and contamination of the oil system.
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   Illustration 1	g00479985

2. Remove seven bolts (1) and hydraulic tank cover (2) from the machine.
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   Illustration 2	g00481366

3. Remove pressure reducing valve (3) from secondary brake system (4).
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   Illustration 3	g00481367

4. Remove two rings (5), seal O-ring (6), seal O-ring (7), ring (8), and seal O-ring (9) from the valve body.

Installation Procedure

1. Clean all parts and inspect all parts. If any parts are worn or damaged, use new Caterpillar parts for replacement.
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   Illustration 4	g00481367
   6E-4287 Seal Kit includes the rings and the seals.

2. Install two rings (5), seal O-ring (6), seal O-ring (7), ring (8), and seal O-ring (9) to the valve body.
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   Illustration 5	g00481366

3. Install pressure reducing valve (3) to secondary brake system (4). Use torque wrench (A) to tighten the valve to 61 ± 6 N·m (45 ± 4 lb ft).
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   Illustration 6	g00479985

4. Install seven bolts (1) and hydraulic tank cover (2) to the machine.