SLEW MOTOR
The Slew Motor rotates the slew platform
via a pinion gear and pinion spacer, the
pinion gear is meshed into a slew gear
wheel which is welded to the Chassis.
The motor has an integral brake which
requires hydraulic pressure to release, this
pressure is provided via a shuttle valve
and a pressure reducing valve which
should be setup at 50 Bar.
The manual slew bypass ball valve allows
the machine to be manualy slewed once the
brake is released, see operation manual.
GENERAL TESTS OF LOAD
HOLDING VALVES
You have seen that all critical
movements rely on 2 components for
safety
•
The lock valve on the cylinder
•
The closed centre on the valve block
The valve blocks used have very low
leakage rate
How do you know if you are holding on
the valve block and not on the cylinder
lock valve ?
Simple - With the pump not running.
operate the valve block as if you were
going to close the ram up. If you get
cylinder movement you know you have a
leaking load holding valve on the
cylinder.
Do not use a machine where the load
holding valve has failed.
BLEEDING
The hydraulic system needs no special bleeding.
If you have stripped a cylinder down or removed
hoses for repair, just operate the cylinder fully in
and fully out and the system is operational.
REMEMBER
Keep it clean - Replace filter and oil regularly - Make sure the oil you put in the tank is
clean - Never fill oil using dirty cans - Remember you use no oil - If you have to
replace oil you have a leak - If you work regularly below 0 deg C and use low viscosity
oil, do not forget to replace the oil for regular grade in the summer to prevent oil leaks
from cylinders and hose ends - Keep a log of relief valve settings to monitor pump
performance - If you have a problem the first thing to do when you arrive is to fit a
pressure gauge to see what is going on. Do not rely on the sound of the pump !
MAINTENANCE PROCEDURE
SHUTTLE VALVE
PRESSURE REDUCING
VALVE
SLEW GEAR
WHEEL
MANUAL SLEW
BYPASS VALVE
BRAKE
SLEW
MOTOR
Page 24
Summary of Contents for POWERED ACCESS TL34
Page 2: ......
Page 4: ......
Page 5: ......
Page 20: ...FIG 5 14 SETTING UP MOTOR RUN HYDRAULIC VALVE LEVERS LEVEL BUBBLE Hydraulic Outriggers ...
Page 33: ......
Page 49: ...MAINTENANCE PROCEDURE Page 15 ...
Page 50: ...MAINTENANCE PROCEDURE Page 16 ...
Page 78: ...Page 44 ...