CAUTION Absolute cleanliness of fuel pump parts must be maintained during all disassembly, inspection, repair, and assembly procedures. Dust, dirt, grime, or any abrasive matter must not come in contact with precision lapped surfaces of internal parts (para 3-2). Support the pump housing so that the timing pointer will not be damaged (para 3-16b). Care should be exercised during installation of the compensator on code A pumps. The top of the fuel control link is not secured to the piston shaft. If the top of the link does not remain engaged in the shaft, the stop plate will fall into the governor housing causing serious damage to the pump (para 3-46a). Do not allow the fuel pressure to exceed 400 psi (para 3-51g).