Hydraulic head (new/unused) for American Bosch PSB-6A series pumps used on the multifuel engines in the M35A2 and M39A2 series trucks. The hydraulic head does not include the plunger button which must be reused from your old hydraulic head. Do not install the head without the plunger button properly installed.
Hydraulic head replaces code A, B, C, D, E pump heads, part numbers:
HD90100A, 11602721, NSN 2910008287176
HD9082A, 10947559, NSN 2910009086318
HD90111A, 11662498, NSN 2910007624623
HD90101A, 11602722, NSN 2910008287167
The hydraulic head is applicable to the following engines: LDS-465-2, LDS-465-1A, LD-465-1, LD-465-1C, LDT-465-1C / D.
Replacing the following early style heads HD9070A, HD90101A, HD9065A (code F and G) also requires that the oil passage below the head is blocked off with kit 5704374, NSN 2910004332237 (we do not stock this kit). Engines LDS-465-1 and LDS-427-2 used the early style head with oil lubrication.
The military service manual for the PSB-6A pumps is available as a PDF download with purchase of the hydraulic head.