37
7. LOAD DROPS WHEN SYSTEM IS LOCKED
•
Leaking cylinder seals or fittings: Remove the load
on cylinders, inspect for damaged hoses or fittings,
tighten fittings or replace hoses if necessary.
•
Faulty cylinder check valves / solenoid coils: Remove
the load on cylinders. Clean or replace the appropri-
ate cylinder check valve components.
8. LEAKY CYLINDER(S)
•
Seals worn or damaged: Have cylinder repaired by a
qualified hydraulics repair shop or replace the cylinder.
•
Rod damaged: Have cylinder repaired by a qualified
hydraulics repair shop or replace the cylinder.
Hy
Hy
Hy
Hy
Hydraulic S
draulic S
draulic S
draulic S
draulic System P
ystem P
ystem P
ystem P
ystem Priming
riming
riming
riming
riming
Safe-Stop® 180 TMA hydraulic systems come direct from
the factory primed and ready to operate. Priming should
only be necessary after changing the oil or if you have
recently repaired a leak.
1. PRIMING PROCESS
Systems that have been disassembled for repair re-
quire priming for proper performance. The hydrau-
lic system is said to be primed when all hoses & the
cylinders are full of oil, and the air has been expelled.
The reservoir should be full of oil (oil just visible at
the filler port) when the TMA is UNFOLDED. Prime
the pump as follows:
A. Detach the long hoses where they connect to all
four cylinder check valves (near the middle brake
light assemblies). Note which hoses connect to
which valves.
B. Jog the pump by briefly depressing the "FOLD"
button until clean oil flows from two of the hoses.
C. Repeat this process for the other two hoses by
briefly depressing the "UNFOLD" button.
D. Replace and retighten all four hoses.
Note that
any NPT (pipe) style threaded fittings should
be lightly coated with thread sealant, prefer-
ably Loctite #545.
CAUTION: Do not completely fold or unfold the
TMA until it has been jogged a few times to
work out any air in the system. Add oil at the
filler port any time that the pump begins to
cavitate.
E. Jog the system a few times by depressing "FOLD"
or "UNFOLD" (depending on the current state of
the TMA). Note that you may need to press and
then unlock the "STOP" button to stop the sys-
tem each time before reversing directions.
2. CHECK FOR THESE PROBLEMS WHEN A SYSTEM
FAILS TO PRIME:
•
Correct pump mounting, with the motor on top
and reservoir at the bottom. All Safe-Stop 180
TMAs should have vertically mounted pumps.
Mounting a pump in some other orientation
would prevent the suction line from picking up
oil, causing cavitation. NOTE: Vertical mount
pumps have a label stating such designation.
•
A solid plug in the reservoir filler port instead of
a vent plug (see Reservoir section).
Reser
Reser
Reser
Reser
Reserv
v
v
v
voir
oir
oir
oir
oir
Note: Do not use a solid plug or fill cap without a
filter/breather element, or damage will be caused
to the pump and/or reservoir.
1. USE RECOMMENDED FLUID:
Fill reservoir with Dexron
®
III or ATF (See Hydraulic
Fluid section).
2. PROPER FILLING:
A. With the TMA UNFOLDED (cylinders fully re-
tracted), fill the reservoir so that oil can just be
seen in the filler port.
B. Operate the unit several times starting with short
cylinder strokes, increasing the length of each
successive stroke. Note that you may need to
press and then unlock the "STOP" button to stop
the system each time before reversing directions.
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