- Commercial Engines:
- 3508 (S/N: 23Z; 3LS; 3PS; 3TS; 5XM; 68Z; 69Z; 6TJ; 70Z; 95Y; 96Y; 97Y)
- 3508B (S/N: 1TW; 2BM; 2HW; 3DM; 3DW; 4GM; 5PS; 6PN; 7SM)
- 3512 (S/N: 1LM; 24Z; 2WK; 3MS; 3RS; 3WS; 49Y; 50Y; 51Y; 65Z; 66Z; 67Z; 6PM)
- 3512B (S/N: 1PW; 2GW; 3ZW; 4AW; 4TN; 6WN; 7HM; 8EM; 8RM)
- 3516 (S/N: 25Z; 27Z; 28Z; 29Z; 3NS; 3SS; 3XS; 4XF; 5SJ; 71Z; 72Z; 73Z; 7KM; 9KF)
- 3516B (S/N: 1NW; 2FW; 3CW; 6HN; 7RN; 8CN; 8KN; 9AN)
- G3508 (S/N: 2JF; 4WD; 9AW; 9TG)
- G3512 (S/N: 4KC; 5JD; 6JW; 7NJ)
- G3516 (S/N: 3RC; 4EK; 5PN; 8LD; 8PW)
Description of Change: New water pump groups are used on these engines. The new water pump groups include a new ring assembly (1) and a new seal group (2). See Illustration 1. These new components will provide the new water pump groups with increased resistance to damage from shock loads. These shock loads typically occur during shipping, handling, and installation of the water pump.
Illustration 1 | g00725764 |
This illustration shows the location of the new 166-4374 Ring Assembly (1) and the new 166-4376 Water Pump Seal (2) in a typical new water pump group. |
Adaptable To: The table identifies the new water pump groups and the corresponding former water pump groups for these engines. The new water pump groups are direct replacements for the former water pump groups.
Corresponding New and Former Water Pump Group     | |
New Water Pump Group Pt. No.     | Former Water Pump Group Pt. No.     |
166-4377     | 122-0501     |
166-4378     | 122-0500     |
166-4379     | 122-0502     |
166-4380     | 122-0503     |
166-4381     | 122-0505     |
166-4382     | 137-8242 or 122-0504     |
Illustration 2 | g00725766 |
This illustration provides the dimensions for adding a new hole (X) to the typical water pump housing. The hole (X) is 2.50 ± 0.05 mm (0.098 ± 0.002 inch) in diameter. The hole (X) is located at a radius (R) of 17.50 ± 0.25 mm (0.689 ± 0.010 inch). Drill hole (X) through the water pump housing. |
Illustration 3 | g00725767 |
This illustration shows the location of Pin (A) in a 166-4374 Ring Assembly . |