TM-9-2815-225-34-P

ENGINE, DIESEL: 6 CYLINDER IN-LINE TURBOCHARGED, CUMMINS MODEL NTC-400

TECHNICAL MANUAL; DIRECT SUPPORT AND GENERAL SUPPORT MAINTENANCE MANUAL INCLUDING REPAIR PARTS AND SPECIAL TOOLS LIST

JULY 2005
TM-9-2815-225-34-P

  TM-9-2815-225-34-P - Page 350 of 736

TM 9-2815-225-34&P
0041 00
0041 00-4
WATER PUMP (Contd)
CLEANING AND INSPECTION
1.
For general parts cleaning information, refer to CLEANING, WP 0051 00.
2.
For general parts inspection information, refer to INSPECTION, WP 0051 00.
NOTE
Replace any part that does not pass visual inspection or is
outside specified wear limits.
3.
Inspect water pump pulley (1) and idler pulley (6) for cracks, chips, or damaged pulley grooves.
4.
Inspect water pump housing (3) for cracks, corrosion, and stripped or elongated bolt holes. Repair
any stripped holes.
5.
Inspect water pump housing (3) weep hole for blockage. Clean weep hole if blocked.
6.
Using inside micrometer, measure water pump housing (3) bearing bore. Discard water pump
housing (3) if bearing bore is larger than 2.45 in. (62.22 mm).
7.
Inspect impeller (4) for cracks, chips, or corrosion.
NOTE
Impeller must be 0.001 in. (0.025 mm) smaller than water
pump shaft impeller end to maintain a press fit between
components. Discard all parts that are out of specifications.
8.
Using micrometer, measure water pump shaft impeller (4) end outside diameter. Diameter
should be 0.6262–0.6267 in. (15.905–15.918 mm).
9.
Using micrometer, measure water pump shaft (2) pulley end outside diameter. Diameter should
be 0.6693–0.6696 in. (17.000–17.008 mm).
NOTE
Water pump pulley must be 0.001 in. (0.025 mm) smaller than
water pump shaft pulley end to maintain a press fit between
components. Discard all parts that are out of specifications.
10.
Using inside micrometer, measure water pump pulley (1) bore inside diameter. Diameter should
be 0.6663–0.6673 in. (16.924–16.949 mm).
11.
Using inside micrometer, measure impeller (4) bore inside diameter. Diameter should be
0.624–0.625 in. (15.85–15.88 mm).
12.
Inspect water pump shaft (2) and idler shaft (5) for cracks, bends, or damaged threads.


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