24
ALWAYS ADD THE HYDRAULIC OIL TO THE RESERVOIR
WHEN THE ELEVATOR IS AT THE BOTTOM.
4) Run the hydraulic line from the pump through the hoistway wall. Ensure that it is well
protected from scraping or cutting (a PVC sleeve is recommended).
5) Secure the oil line to the Upstand Post with hose clamps (gear clamps). For the hydraulic
hose, ensure that when the line is bent toward the machine room, the bends do not
exceed the manufacturer’s recommendations for maximum bending radius, (as noted on
the hose tags supplied). Use care when tightening the clamps to make sure that the lines
are not cut or crimped by the clamp. NOTE: Never run the hydraulic hose across the
pit floor
.
6) Attach the hydraulic hose to the JIC fittings at the pump and jack. Roll up any excess.
7) a) If steel pipe and fittings are used instead of hydraulic hose, make sure the pipe and
fittings have the proper rating. (See Figure # 14). Most jurisdictions require
minimum Schedule 40 oil line and fittings. When routing the oil line to the hydraulic
jack assembly, always minimize the number of 90
o
bends in the line. Each 90
o
bend
causes pressure loss and increases the noise level, as the elevator operates.
b) Insulate the oil line where it passes through the shaft wall to prevent vibration. The
code permits the use of hydraulic hose within the machine (pump) room. It is
recommended practice to install a short length of hydraulic hose from the gate valve
on the pump to where the steel oil line starts to pass through the shaft wall. This will
help reduce the noise level from the pump/motor operation.
c) The steel oil line must be securely supported to reduce noise and eliminate vibration
that may loosen or damage fittings and connections. Support the steel pipe on the
Upstand Post and clip it to the shaft wall using insulating clips.
d) For a 90
o
elbow, a 1/2" male NPT to 1/2" male NPT is suggested. Remember, all
fittings must be high strength (minimum Schedule 40).
e) For long runs of pipe, minimize the number of 90
o
bends by using 45
o
and 30
o
fittings, wherever possible. Use the following chart as a guide:
DISTANCE
(Length of Oil Line/Hose)
RECOMMENDED SIZE OF OIL
LINE/HOSE
30 feet or less 1/2" Diameter
31 to 60 feet 5/8" Diameter
61 to 100 feet 3/4" Diameter
Over 100 feet 1" Diameter
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