SUTPHEN TOWERS, INC. 2012
Manual-2012
_SL75-SA75-SP70.docx
Page 31 of 55
8/31/2012
platform will keep the platform level. This is an exclusive safety feature of this tower.
HYDRAULIC OIL TANK
The tank, located in under the left side rear cab entrance, has a capacity of 32 gallons. The
hydraulic oil furnished in your aerial tower hydraulic system is filtered Dexron III hydraulic oil.
Maintain the oil level to the mark on the dipstick attached to the tank cap. Ensure the new
hydraulic fluid is filtered to ISO code 22/18/13.
When checking or adding oil, make sure all hydraulic systems are at rest
(retracted). Failure to do so will result in overfilling the system.
The hydraulic oil filters should be changed after the first three (3) months of service and
changed annually thereafter.
This is done as follows:
1. Shut off oil to filter at tank valve.
2. Remove the filter.
3. Inspect oil in the filter. Do this by using a piece of clear glass, a white cloth or piece of
paper, and pouring some of the oil in the filter onto it. This way any dirt, filings, and
moisture will be observed.
4. Replace the filter.
There are three filters in the hydraulic system, one located in the reservoir lid
(6 micron), one in the high pressure portion of the system (6 micron), and
one at the fill location (3 micron). Each must be replaced in kind. Failure to
do so could result in damage to the hydraulic system or cause poor operation
of the tower.
5. After replacing the filter, turn the shutoff valves on.
6. Run the hydraulic system for 1 to 2 minutes to circulate oil through the filter.
7. Check the oil level and add oil to the proper level, if required.
All hydraulic cylinders and actuators, except cab lift, must be in the
retracted position (i.e.: travel position)
1. Locate the TOFU suction hose supplied with the vehicle, the Hydraulic
Tank Fill port (A), and the Hydraulic Tank Fill switch (B).
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