Service

Fig. 42 Oil pump. 6-300:

Fig. 43 Oil pump. V8-255, 302, 351W:

Fig. 44 Oil pump assembly. 351M & 400:

ROTOR TYPE PUMP
1. To disassemble, Figs. 42, 43 and 44, remove cover, inner rotor and shaft assembly and outer race. Remove staking marks at relief valve chamber cap. Insert a self-threading sheet metal screw of proper diameter into oil pressure relief valve chamber cap and pull cap out of chamber. Then remove spring and plunger.
2. To assemble, install pressure relief valve plunger, spring and a new cap. Stake cap in place. Install outer race, inner rotor and shaft. Be sure identification dimple mark on outer race is facing outward and on the same side as dimple on rotor. Inner rotor and shaft and outer race are furnished only as a unit. One part should not be replaced without replacing the other.
3. Install pump cover.