D379, D398, D399 INDUSTRIAL & MARINE ENGINES Caterpillar

1. Remove the bolts (2) that hold valve to oil pan.

2. Remove valve and tube from the tee (1).

Install Oil Pressure Relief Valve

1. Slide valve and tube in the tee.

2. Install the bolts that hold valve to oil pan.

Disassemble Oil Pressure Relief Valve

start by:

a) remove oil pressure relief valve

1. Remove the bolts (2) that hold tube to housing. Remove the tube (1).

2. Remove the piston, spring and guide from the housing.

Assemble Oil Pressure Relief Valve

1. Install new seals.

2. Put clean engine oil in the bore of housing. (1).

3. Install the guide (2), spring (3), and piston (4) in housing. Install the tube (5) on housing.

end by:

a) install oil pressure relief valve