TM 5-4930-227-14
CHAPTER 5
DIRECT SUPPORT AND GENERAL SUPPORT
Section I.
5-1. Scope
These instructions are published for the use of
direct support and general support maintenance
personnel maintaining the tank and pump unit.
They provide information on the maintenance of
the tank and pump unit which is beyond the
GENERAL
scope of the tools, equipment, personnel, or sup-
plies normally available to using organizations.
5-2. Forms and Records
DA forms and records used for equipment main-
tenance will be only those prescribed in TM 38-
750.
Section Il. DESCRIPTION AND DATA
5-3. Description
c. Engine Overhaul Data.
For a complete description of the tank and pump
Bore _________________2 7/8 in.
unit, refer to paragraph 1-4.
Stroke ________________ 2 3/4 in.
5-4. Tabulated Data
Displacement _________ 17.8 cu in.
a. General. This paragraph contains all tabu-
Rotation _____________Clockwise (flywheel end)
lated data pertinent to direct support and
Brake horsepower ________4.49 at 3,000 rpm
general support maintenance personnel.
Spark plug gap _______.030
b. Nut and Bolt Torque Data. Refer to table
Magneto points _________.0.0l5
5-1.
Carburetor ___________Idle at 1,000-1,200 rpm
Table 5-1. Nut and Bolt Torque Data
d. Engine Repair and Replacement Standards.
Cylinder head screws ______14-l8 ft-lb
Table 5-2 lists the manufacturer’s sizes, toler-
Oil pan screw _______________ 6-8 ft-lb
Rod cap belt _________ 18-l8 ft-lb
antes, desired clearances, and maximum allowable
Main bearing cap belt _____.l4-l8 ft-lb
wear and clearances.
Table 5-2. Repair and Replacement Standards.
Component
Crankshaft
Diameter of journal
Clearance to connecting rod
Width of journal
Connecting rod side clearance
End play (cold)
Piston
Ring gap
Ring side
Clearance in grooves:
Top ring
2nd and 3rd ring
Oil ring
Manufacturer’s
dimensions
and tolerances
in inches
Desired
clearance
Min
1.000
1.000
Max
1.001
1.005
Min
0.007
0.006
0.002
0.012
0.002
0.001
0.0025
Max
0.002
0.013
0.004
0.022
0.0035
0.0025
0.004
0.002
0.013
0.004
0.022
0.0035
0.0025
0.004
5-1
