TM 9-2350-222-34-1
FUEL PRIMER PUMP PISTON ROD ASSEMBLY REPAIR (Sheet 2 of 3)
CLEANING AND INSPECTION:
1. Clean all parts of piston assembly as required.
2. Using an inside and outside micrometer, check parts
for wear as indicated. Replace all parts that do not
meet wear limits.
PRIMER PUMP WEAR LIMITS
Reference
Point of
Size and fit
Wear
Letter
Measurement
of New Parts
Limits
A
ID of clevis bore
0.248 to 0.253
0.256
B
Fit of pin in
0.000 to 0.010L
0.008L
yoke
C
OD of piston rod
0.497 to 0.499
(*)
D
ID of gland
0.505 to 0.507
(*)
C-D
Fit of rod in
0.006L to 0.010L
(*)
gland
E
OD of piston
0.990 to 0.995
(*)
An asterisk (*) in the wear limits column indicates part should be replaced when
worn beyond limits given in size and fit of new parts column.
An L following a dimension indicates loose fit.
3. Inspect all parts for cracks or deformities.
Replace as required.
Go on to Sheet 3
TA130552
4-93