TM 9-2320-272-24-3
4-63. WATER PUMP (M939/A1) MAINTENANCE (Contd)
NOTE
This table provides the minimum, maximum, and worn
l
serviceability standards for the water pump assembly. The wear
limits indicate the point to which a part or parts may be worn
before replacement is required.
An asterisk (*) in the wear limits column indicates the part or
l
parts must be replaced or repaired when worn beyond the
dimensions specified in the "size and fit of new parts" column.
Table 4-8. Repair and Replacement Standards for Water Pump.
WEAR
REF.
SIZE AND FIT
LIMITS
NO.
OF NEW PARTS
POINT OF MEASUREMENT
WATER PUMP BODY
2.4494 in.
2.4408-2.4414 in.
Housing bearing bore
1
(62.215 mm)
(61.996-62.012 mm)
*
1.5000-1.5200 in.
Housing bore (impeller end)
2
(38.100-38.608 mm)
water pump body (I.D.)
0.001 in.
Minimum press fit between shaft and
(0.03 mm)
impeller
*
0.663-0.6673 in.
Drive pulley bore inside diameter (I.D.)
3
(16.84-16.949 mm)
0.001 in.
Minimum press fit between shaft and pulley
(0.03 mm)
SHAFT
*
0.6262-0.6267 in.
Shaft diameter (O.D.)
4
(15.905-15.918 mm)
Impeller end
*
0.6262-0.6267 in.
Shaft diameter (O.D.)
5
(15.905-15.918 mm)
Seal seat location
*
0.9843-0.9847 in.
Shaft diameter (O.D.)
6
(25.001-25.011 mm)
Inner bearing
*
0.9843-0.9847 in.
Shaft diameter (O.D.)
7
(25.001-25.011 mm)
Outer bearing
*
0.6693-0.6696 in.
Shaft diameter (O.D.)
8
(17.002-17.007 mm)
Pulley end
IMPELLER
*
0.624-0.625 in.
Impeller bore inside diameter (I.D.)
9
(15.85-15.88 mm)
*
0.020-0.040 in.
Impeller vane to pump body clearance
10
(0.51-1.02 mm)
(cast iron)
4-382
