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25~33L-7M

GM 3.0L Engine

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Mast Specifications

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25 ~ 33L-7M

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25 ~33LC-7M

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Engine

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Main Component Specifications

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Power Train Specifications

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Lubrication Chart

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Training Topics

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Power Train

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Transmission Assembly

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Axle Assembly

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Max brake Pressure

2062 psi (145mg/cm)

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Hydraulic System

Hydraulic Circuit (No OPSS and non Boosted Brake)

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Hydraulic Circuit (No OPSS and non Boosted Brake)

1 Hydraulic gear pump

2 Dual flow divider

3 Main control valve

4 Brake valve

5 Steering unit

6 Steering cylinder

7 Lift cylinder8 Tilt cylinder

9 Suction strainer

10 Return filter

11 Down safety valve

12 Hydraulic tank

Hydraulic Circuit (with OPSS and Boosted Brake)

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Hydraulic Circuit (with OPSS and Boosted Brake)

1 Hydraulic gear pump

2 Dual flow divider

3 Main control valve

4 Brake valve

5 Steering unit6 Steering cylinder

7 Lift cylinder

8 Tilt cylinder

9 Suction strainer

10 Return filter

11 Down safety valve

12 Hydraulic tank

M i C t l V l OPSS A li d

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Main Control Valve OPSS Applied

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Hoist Position

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Hoist Position

H i t i L P iti

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Hoist in Lower Position

Tilt Forward

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Tilt Back

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Tilt Back

A ili S l

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Auxiliary Spool

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Inlet Section Operation

When the Lift Cylinder Rod is moving Up

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When the Lift Cylinder Rod is moving Up

When Lift reaches Relief Pressure

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When Lift reaches Relief Pressure

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Lift Cylinder

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Lift Cylinder

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Tilt Cylinder

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Tilt Cylinder

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Free Lift Cylinder

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Steering System

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25L / 30L / 33L 7M

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25LC ~ 30LC 7M

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Braking System

Specifications

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p

3) Brake Pressure to the Axle: 2062 psi (145 kg/cm

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Inching Pedal and Linkage

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Adjusting the Inching Pedal

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Adjustment Of Pedal

BRAKE PEDAL

1) Pedal height from floor plate Adjust withstopper

bolt..Pedal height : 160mm (6.3in)

2) Idle stroke

Adjust with rod of master cylinder.

Play : 1~3mm

Brake Valve

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Specification of master cylinder.

Cylinder bore diameter: 22.23mm

Piston stroke : 281mm

Brake Bleeding

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Air bleeding should be performed

by two persons : One rides on

truck for depressing and releasingbrake pedal: the other person is on

the ground and removes cap from

air vent plug on wheel cylinder.

Block the front wheel securely and

apply parking brake. Start the

engine. Attach a vinyl tube to air

vent plug and immerse other end

of tube into a vessel filled with

hydraulic oil. Loosen air vent plug

by turning it 3/4 with a wrench.

Depress brake pedal to drain oil

mixed with air bubbles from plug

hole. Depress brake pedal until no

air bubbles come out of air vent

plug hole. After completion of air

bleeding, securely tighten air vent

plug. Install cap on plug.

Parking Brake

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1) Operating force of parking lever is

35 - 40kgf/m(253 - 290lbf/ft).

2) Check that parking brake can hold

machine in position when loaded

on 20%slope. If there is no slope

available, travel at low speed and

check braking effect of parking

brake.

1) After assembling parking brake and parking

cable, put the parking brake lever released.

2) Loosen the nut for parking brake plate to

play up and down.

3) Move up the plate so that the stopper canbe contacted with the pin and then

reassemble nut.

Micro switch stroke when parking brake is

applied : 2~3mm (0.08 ~ 0.1in) ((3)

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Electrical Systems

Component Location

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Starting Circuit

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Fuel Systems

3.0Ltr GM (PSI Control)

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