Reinstalling the HEUI Pump
(5) 227-5904 O-Ring Seal
(12) 185-3241 O-Ring Seal
Install the HEUI pump on the engine. Refer to the Disassembly and Assembly Manual for the correct procedure. Ensure that the system does not have any leaks.
Note: Be sure to use the appropriate seal for your individual application. Use a new 185-3241 O-Ring Seal (12 ) on the 204-4944 Unit Injector Hydraulic Pump Gp , the 220-4276 Unit Injector Hydraulic Pump Gp , and the 220-6214 Unit Injector Hydraulic Pump Gp . Use a new 227-5904 O-Ring Seal (5) on all other unit injector hydraulic pumps. Refer to Illustration 9. Discard the old seal and install the new seal.