Cincinnati 175 CB - Section 6: Maintenance and Adjustments; Lubrication and Hydraulic System

SECTION 6
MAINTENANCE AND ADJUSTMENTS
To maintain the exceptionally accurate performance of your
CINCINNATI Hydraulic Press Brake there are certain
maintenance practices that should be followed. This section
of the manual will deal with the maintenance and
adjustments of CINCINNATI CB Hydraulic Press Brakes.
LUBRICATION (FIGURE 34)
through the filter. When the oil is changed the machine
should be run in idle for a few hours while filter indicator
is watched. Change the filter element if required.
Refer to CINCINNATI INCORPORATED Recommended
Lubricants sheet included with this manual for' various
manufacturer's brand names.
1. Clean the exposed portions of the leveling tape.
(Weekly)
OIL FILLER-BREATHER
2. Place a few drops of oil on the bottom stroke stop
adjusting screw and on the tilt adjusting screw.
(Weekly)
3. Lubricate the clevis pin grease fittings while cycling
ram under load, such as obtained with a bumping die.
Use a No. 2 Lithium base grease with "moly" additive
(C.I. grease H-2M). Lubricate once a week for first
six weeks and once a month thereafter.
A combination of oil filler-air breather (Figure 6) is located
in the top of the oil reservoir. As oil is pumped out of
reservoir to the cylinders during operation, it is replaced
by air. The filler cap has a 40 micron element which
filters air. entering the reservoir.
To clean oil filter strainer, remove six screws and lift out
strainer unit.. Backflush strainer with solvent. Allow to
dry before replacing. To clean air breather, remove cap
and back blow with low pressure air hose. Clean yearly.
FIGURE 36
An immersion suction strainer (Figure 36) is attached to the
pump intake line.. This strainer is accessible by removing
the right reservoir cover plate. The suction strainer
should be replaced every six mon ths or after each 1 ,000
operating hours.
r SERVO VALVE
I
j
I
I
RETURN LINE FILTER
MAIN RELIEF VALVE
FIGURE 35
LOW VOLUME
PUMP SUPPLY
OIL FILTERS
The hydraulic reservoir should be filled to the center of
the oil level gage with the ram at the top of its stroke.
Use light hydraulic oil, viscosity 150 seconds at 100
0
F with
anti-rust, anti-oxidation and anti-wear additives (C.I. oil
B-150). The capacity is 80 gallons for the 90 CB and 135
CB, and 175 gallons for the 175 CB and larger.
FIGURE 34
4. The ram guides should be wiped clean and flushed· with
oil. (Monthly or as required)
It is very important that the oil be clean. All precautions
should be taken to keep· the oil clean, free from chips,
grit, w'ater, sludge, coolants, cutting oils, etc. The oil
should be filtered (10 micron) \vhen put in the reservoir
and replaced when sludge is evident. The oil level should
be checked daily and check for water accumulation monthly.
The oil should be drained and replaced after one year
service or sooner if it becomes contaminated. The drain
valve is located in the bottom of the reservoir.
New oil stored in drums is usually not clean as the filtered
oil shipped . with the machine. Oil should be pumped
through a 10 micron filter or added through the return line
filter. Do not remove the bypass check when adding oil
HYDRAULIC OIL
23