3-12
C A U T I O N
Brake dust may be hazardous. Observe precautions to prevent breathing large
amounts of brake dust.
Brake Pads and Rotors: Recall that the steering system on the RT-300 is non-load
reactive. The operator will not be able to “feel” pad or rotor problems in the steering wheel.
On a weekly basis, check to see if the rotors appear worn, grooved, warped, or otherwise
damaged. When applying the brakes, listen for squeaking. Observe the wheels for any
vibration or unusual motion during braking. If any of these conditions are present, a
thorough inspection is required to find and fix the source of the problem.
Regardless of other indications, a thorough inspection of the pads and rotors must be
performed at least every 1000 hours. Remove the tire and wheel assemblies. Note that
proper tire handling equipment must be used when removing tires of this size. Inspect the
pads, and replace them if they are cracked, worn. Replace pads if the lining without metal
back plate is less than 0.125” thick. Inspect the rotors, and replace them if they are
grooved or warped. Replace rotors if they are less than 0.5” thick.
Brake Unloading Valve: Mounted under the floorboard of the operator’s compartment.
Also called an accumulator charging valve. The brake unloading valve sends pressure to
the accumulators if low pressure is detected. No routine maintenance is needed on the
brake unloading valve.
The operator can hear the accumulators charge. If the accumulators charge frequently
without depressing the brake pedal, the brake unloading valve, accumulators, or brake
hoses may be leaking. If no leaks can be found, check accumulator pre-charge pressure.
If pre-charge pressure is adequate, it may be necessary to repair or replace the brake
unloading valve. If the accumulators do not charge, take a long time to charge, or cycle
very rapidly, it may be necessary to repair or replace the brake unloading valve.
Relief pressure for the brake circuit is located in the unloading valve. It is set at 2925 psi
(202 bar) at the factory. The relief pressure cannot be adjusted. The relief pressure can
be checked by installing a pressure gauge at the P port of the valve.
Brake Modulating Valve: Directly connected to the brake pedal. This valve sends pressure
and flow to the brake calipers when the brake pedal is depressed. Lubricate the pedal
hinges with a silicone lubricant as shown on the lubrication chart on page 3-10. No other
routine maintenance is required.
If the brakes do not apply and the Brake Malfunction Light is not illuminated, the brake
modulating valve may need repair or replacement. If the brakes do not fully release and
the brake calipers are functioning properly, the brake modulating valve may need repair or
replacement.
Summary of Contents for RT-300-2G
Page 6: ...1 2 DIMENSIONAL DATA Courtesy of Crane Market...
Page 7: ...1 3 RT 300 2G TURNING DIMENSIONS Courtesy of Crane Market...
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Page 33: ...2 17 CAPACITY CHART FOR RT 300 2G Courtesy of Crane Market...
Page 34: ...2 18 CAPACITY CHART FOR RT 300 2G METRIC Courtesy of Crane Market...
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Page 89: ...Powered by TCPDF www tcpdf org Courtesy of Crane Market...
