Mitsubishi PBV20N2 Service Manual page 134

© Mitsubishi Forklift Trucks 2013. All © Mitsubishi Forklift Trucks 2013. All rights reserved. rights reserved. Revision: B Revision: B
PBV20N2 PBV20N2
The principle of the truck's hydraulic operation is as The principle of the truck's hydraulic operation is as follows:
Lifting: Lifting:
1. 1. The The electrical electrical motor o motor operates
2. 2. The The hydraulic hydraulic fluid fluid is is pressurized. pressurized.
3. 3. The fluid The fluid pressure is m pressure is maintained
pressure. In such cases, the hydraulic fluid is returned to the fluid pressure. In such cases, the
pressure of the relief valve is indicated in the hydraulic schematics. pressure of the relief valve
4. 4. The pressu The pressurized hydraul rized hydraulic fluid flow
cylinder. cylinder.
5. 5. The The lifting lifting cylinder cylinder piston piston lifts
Figure 80. Hydraulic fluid flow during lifting Figure 80. Hydraulic fluid flow during lifting
Lowering Lowering
1. 1. The The solenoid solenoid valve valve is open is opened with
2. 2. The The hydraulic fluid hydraulic fluid flows flows through
3. 3. As the hy As the hydraulic pressu draulic pressure reduces,
are lowered. are lowered.
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Document ID: 615023 Document ID: 615023
perates the hyd the hydraulic g raulic gear pu ear pump.
aintained using the using the relief valve, relief valve, which ope
hydraulic fluid is returned to the fluid tank. The opening
is indicated in the hydraulic schematics.
ic fluid flows through s through the no-return the no-return valve to th
lifts the the forks. forks.
ed with the lo the lowering wering switch.
through the the 300 300 μ sieve back to the fluid tank. μ sieve back to the fluid tank.
re reduces, the lifting the lifting cylinder piston cylinder piston retracts and
Service Manual Service Manual
follows:
mp.
which opens at a ns at a certain certain
tank. The opening
valve to the lifting e lifting
switch.
retracts and the forks
133 (244) 133 (244)
the forks