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Figure 2-3. Compression test.
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TM-5-4320-234-34 Pump Centrifugal Self-Priming Gasoline Engine Driven Wheel Mounted 6-Inch 1500 GPM Capacity At 60 Foot Head Manual
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Figure 2-4. Valve adjustment.
TM 5-4320-234-34
HAVE HELPER
WITH GAGE ATTACHED
DO ALL OTHER
TURN OVER ENGINE
TO NO. 1 CYLINDER....
CYLINDERS THE SAME.
ABOUT 10 REVS.
****
ZERO GAGE AND CLEAN TIP
AFTER EACH CYLINDER TEST.
****
SAMPLE READING
3
5
CYL
2
4
1
6
120
125
PSI
125
100
115
115
DON' OVERHEAT
T
STARTER
CAUSE & CURE:
LOOK FOR SIGNS OF LEAKAGE. IF ANY, REPLACE GSKET IF MAC SAYS SO.
WET TEST EACH CYLINDER. DO THE SAME FOR A DRY TEST. BUT BEFORE
SCREWING IN THE GAGE, SQUIRT A LITTLE OIL ON THE CYLINDER WALL--
ALL AROUND. IF THE PSI GOES TO ALLOWABLE MINIMUMS (STEP 15) OR ABOVE,
THE RINGS ARE BAD. NOTIFY YOUR NEXT HIGHER LEVEL OF MAINTENANCE.
OVERHEAD
IF WET TEST DID NOT IMPROVE READINGS ADJUST VALVE
3. BAD OR MISADJUSTED VALVES
CLEARANCES. IF COMPRESSION IS STILL BAD, REFER TO
NEXT HIGHER LEVEL OF MAINTENANCE...PRE YOUR MAC
CHART.
FLATHEAD TYPE
IF WET TEST DID NOT IMPROVE READINGS AND GASKET
IS OK, NOTIFY NEXT HIGHER LEVEL OF MAINTENANCE.
TS 011524
2-5

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