10.13
Section 10
Inspection and Reconditioning
10
Figure 10-16. Oil Pump, Oil Pickup, and Relief
Valve (Original Style).
Figure 10-17. Oil Pump, Plastic Oil Pickup, and
One-Piece Relief Valve (Later Style).
Inspection
Inspect the oil pump housing, gear, and rotors for
nicks, burrs, wear, or any visible damage. If any parts
are worn or damaged, replace the oil pump.
Inspect the oil pressure relief valve piston. It should be
free of nicks or burrs.
Check the
spring for wear or distortion. The free length
of the spring should be approximately
47.4 mm
(1.8 in.)
. Replace the spring if it is distorted or worn.
See Figure 10-18.
Figure 10-18. Oil Pressure Relief Valve Piston and
Spring.
Reassembly
1. Install the pressure relief valve piston and spring.
2. Install the oil pickup to the oil pump body.
Lubricate the O-Ring with oil and make sure it
remains in the groove as the pickup is being
installed.
3. Install the rotor.
4. Install the oil pump body to the oil pan and secure
with the two hex. flange screws. Torque the hex.
flange screws as follows:
First Time Installation:
10.7 N·m (95 in. lb.)
All Reinstallations:
6.7 N·m (60 in. lb.)
5. After torquing, rotate the gear and check for
freedom of movement. Make sure there is no
binding. If binding occurs, loosen the screws,
reposition the pump, retorque the hex. flange
screws and recheck the movement.
Piston
Spring
Roll Pin
Kohler Engine Parts Call K&T 606-678-9623 or 606-561-4983
www.mymowerparts.com
