Zico QUIC-LIFT HLAS Series, Parts And Instruction Manual

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B. Semi-Annually or at Scheduled Apparatus Lube Service (continued)
c. Replace dip stick, placing it in the hole, but do not tighten.
d. if the oil touches the bottom line of the two "full" lines, then pump is full. This may be
checked by fully tightening the dip stick in place and then removing it. The oil level should be
between the two "full" lines.
e. if oil needs to be added, the pump manufacturer recommends oildyne hydraulic fluid be
used with the system as follows:
ATf, od18, or other clean hydraulic oil with a viscosity of 150 to
300 SuS at 100 degrees fahrenheit. System capacity (dry) is
32 ounces.
C. Replacing Hydraulic Fluid in the Pump
The whole procedure may take one to two hours. Have replacement seal and 32 ounces of fluid
available before starting the job. Hydraulic fluid in this sytem may be under pressure. Always wear
safety glasses and protective clothing and use the following procedure to change the fluid:
1. Lower the booms and remove the ladder rack and ladders.
2. Slowly remove the hydraulic lines from the fittings on the front side of the pump. See figure 14.
3. Disconnect the electric wires to the hydraulic pump.
4. remove the two bolts (45) and lock washers (73) holding the power unit mounting bar (32) to
the base casting (1) and remove the power unit (7).
5. Clamp the mounting bar (32) in a vise with the pump held in the vertical position (same as
mounted position).
6. With the pump mounted in the vise and a drain pan under the reservoir, loosen and remove the
dip stick. Remove the screw in the bottom of the pump reservoir and remove the reservoir. At this
time the old oil may be discarded and the reservoir cleaned.
7. Check the two filter screens in the bottom of the pump and clean if necessary.
8. Place the two open hydraulic lines into a receptacle. Raise and lower the booms by hand to blow
the fluid from the hydraulic cylinder (8). There should be approximately 12 ounces of fluid.
CAUTION: Control the raising and lowering of the booms. Do not allow them to drop
uncontrolled.