DMC HC134, Service And Operation Manual, Page: 30 / 31

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TROU BLE
3. Tools fails to build
up pressure as
indicated by the
HPG 1 pressure
g au ge.
CAUSE OF TROU BL E
4. Ball valve 26 o r bal l
valve 25 lea king.
5. Bypass bal I valve 25
leaking.
6. Pressure relief valve leaking.
1. Pressure relief va Ive leaking.
2. Air in hydraulic system.
4. Pump piston leaking.
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1. Piston sealing rings failed.
27 OF 28
REPAIR INSTRUCTIONS
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4. If the handle springs back
after rea ching bottom of
stroke when pumping,
outlet ba II valve 25 is
leaking. Follow recommended
procedures in SERVICE OF
INLET /O UTLET BALL VALVES.
5. Follow recommended procedures
in REMOVAL OF BYPASS BALL
VALVE. Inspect bal ls, ball seats
and springs for damage, replacing
parts as necessary. Al so ch eek
for foreig n matter. If a l l com po
nents are found in satisfactory
condition, bal l reseating in recom­
mended. Follow procedures in
RESEATING OF BALL VALVE SEATS.
6. Follow recom mended procedures
in ADJUSTMENT OF PUMP SYSTEM
PRESS URE. Check for scoring of
PSI valve seat.
1. Follow recommended procedures
in ADJ USTMENT OF PU MP SYSTEM
PRESSURE. Check for scoring of
PSI valve seat. Make sure
locking screw 61 is sec u rely
tightened against adjustment
screw 8.
2. Follow recommended procedures
in REPLACING OIL PLU NGER
0-RING.
1. Follow recommended procedures
in REMOVAL OF PUMP PISTON
SEALS.