Cincinnati 175 CB - Maintenance Check List

TROUBLE
PROBABLE CAUSE
WHAT TO DO
Q.
Pump motor stops when-
1.
Tilt limit switch(s) lLS or
1.1 Tilt switch trip point is set
ever ram is stopped and
2LS are being tripped.
too close. Adjust to specifi-
will not re-start.
cations.
1.2 Slow acting counterbalance
valve - repair or replace.
R.
Noisy pump.
1.
Cavitation.
1.1 Clogged inlet line.
1.2 Low fluid level.
1.3 contaminated fluid -
replace.
2.
Worn pump.
2.
Overhaul -
replace.
3.
Air in fluid. 3.1 Loose connections.
3.2 Pump shaft seal.
Solenoid valves - The 4-way directional control valves
used on this machine are pilot operated with DC
solenoids and manual overrides. A service parts
information bulletin is contained with the assembly
drawings in this manual. When a control valve is
suspect of faulty operation the following should be
verified before replacing-the valve:
A. Is valve receiving control signal?
B. Is valve receiving pilot pressure?
Three simple maintenance procedures which have the
greatest effect on hydraulic system performance,
efficiency and life are:
A. Maintaining a clean sufficient quantity of
hydraulic fluid of the proper type and
viscosity.
B • Changing filters and cleaning strainers.
c. Keeping all connections tight, but not to the
point of distortion,. so air is excluded from the
system.
MAINTENANCE CHECK LIST - CB HYDRAULIC PRESS BRAKES
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f-
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LUBRICA TION SCHEDULE
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Z
Z
..J
>-
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t-
O
0
a:
....J
W
Z
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W
0
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:E
w
0
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(I')
CO
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1
Check reservoir oil level
X
2
Cleanl~veling ba.nd
X
3
Lubricate stroke adjustment and tilt adjustment screws
X
4
Lubricate cylinder clevis pins
X
5
Clean and flush ram guid~s with oil
X
6
Check for water in reservoir
X
7
Drain, clean and refill hydraulic reservoir
X
CHECK OR ADJUSTMENT
1
Check entire machine for loose fasteners-tighten if necessary
X
2
Wipe entire machine clean
X
3
Check leveling system
X
4 Check machine levelness
X
5
Check ram guide clearance
-
relevel if necessary
X
6
Adjust swivel end guide bearings
X
7
Replace oil return line filter element
X
8
Replace pump suction filter
X
9
Clean reservoir oil filler-breather
X
10
Check hydraulic pressures
X
ABOVE INTERVALS ARE BASED ON ONE SHIFT AND NORMAL PRESS OPERA TJON. DETAILED
INSTRUCTIONS FOR SERVICING THE MACHINE CAN BE FOUND IN THIS MANUAL.
30