| Tweet |
Custom Search
|
|
|
||
 TM 55-1905-220-14-10
5-43. CYLINDER BLOCK - MAINTENANCE INSTRUCTIONS (Cont).
LOCATION
ITEM
ACTION
REMARKS
PRESSURE TEST
3.
After the cylinder block has been cleaned, it must be pressure tested for cracks or
leaks by either one of two methods.
(a) This method may be used when a large enough water tank is available and the
cylinder block is com- pletely stripped of all parts.
(1) Seal off the water inlet and outlet holes air tight. This can be done by
using steel plates and suitable rubber gaskets held in place by bolts. Drill
and tap one cover plate to provide a connection for an air line.
(2) Immerse the block for twenty minutes in a tank of water heated to 180-
200 (82.2 - 93.3C.).
F
(3) Apply 40 psi (275.8 kPa) air pressure to the water jacket and observe the
water in the tank for bubbles which indicate the presence of cracks or leaks
in the block. A cracked cylinder block must be replaced by a new block.
Wear protective eye goggles when using compressed air.
(4) After the pressure test is completed, remove the block from the water tank.
Then remove the plates and gaskets and dry the block with compressed
air.
b. This method may be used when a large tank is unavailable, or when it is desired to
check the block for cracks without removing the engine from the equipment which it
powers. However, it is necessary to remove the cylinder heads, blower, oil cooler,
air box covers and oil pan.
5-628
|
||
|
||
