Isuzu N-Series. Manual - part 3

POWER TAKE OFF 00-7

ON-VEHICLE SERVICE

Inspection and Supply of The Hydraulic Op-
erating Fluid

Notice:

When inspecting and supplying hydraulic operating flu-
id, you might have incurred danger. In that case, inspect
and supply hydraulic operating fluid after having fully
checked safety.

Symptoms Due to Insufficient Hydraulic Oper-
ating Fluid

The following symptoms might have occurred. In that
case, inspect and supply hydraulic operating fluid be-
cause it may be insufficient.

1. The body (cargo deck) is raised only immediately.
2. The body (cargo deck) is lugged during rise.
3. While the body (cargo deck) is being raised, the oil

pump portion causes a large abnormal sound
(such as caterwaul or grate).

4. After the body (cargo deck) has been raised, it

drops generating a knock.

Preparing for Hydraulic Operating Fluid Supply

If there is loading, pull down the loading. Then supply
hydraulic operating fluid after having safely and more
carefully raised the body (cargo deck) and having firmly
held the body (cargo deck) by the “safety rod” and the
“safety strut” in accordance with the following “How to
raise the body (cargo deck)”.

How to Raise the Body (Cargo Deck)

1. Put a truck at a horizontal place.

Notice:

Never raise the body (cargo deck) on tilted ground, soft
ground, and unleveled ground. A truck may be inverted
or warp may be generated in functional components.

2. Set the shift lever to the “Neutral” position.

3. Firmly actuate the parking brake and apply a

scotch to the rear tire.

4. Start the engine and depress the clutch pedal to

the floor. Push in the lock button of the dump lever
and release the lock to set the “Up” position.

Notice:

Fully check that there is no person or hindrance around
a truck.
When the dump lever is operated, observe the notes of
the Note label attached to the driver's seat.

NPA0014E

Legend

1. Release button
2. Parking brake lever

NPA0015E

NPA0016E

00-8 POWER TAKE OFF

5. When the clutch pedal is slowly returned, the body

(cargo deck) is raised.

• Adjust raised speeds according to the pedal

feel of the accelerator.

• When raising the body (cargo deck), be sure to

check the lock of the dump lever.

• After having raised the body (cargo deck), held

the body by the safety rod and the safety strut
and stop the engine.

Notice:

Suddenly returning the clutch pedal is very dangerous.
Use the engine at about 1,000 to 1,500 rpm, and do not
perform high-speed rotation, sudden acceleration and
deceleration, and unnecessary idle rotation.

Notice:

Raise the body (cargo deck) paying full attention to safe-
ty and firmly hold the body (cargo deck) by the safety rod
and safety strut.

Supply Procedure of Hydraulic Operating
Fluid

Notice:

Be sure to supply a specified amount (check it by the
level plug) of hydraulic operating fluid using a cleaned oil
supply container paying full attention so that dust or for-
eign matter will not be mixed in. After having supplied
oil, firmly tighten each plug.
When replacing the total amount of hydraulic operating
fluid, request a service network (SS store) of a body
manufacturer.

1. Remove the oil supply plug and level plug of the oil

tank in the engine stopped state.

2. While supplying hydraulic operating fluid from the

oil filler port, supply it until the hydraulic operating
fluid flows out from the level plug.

3. Remove the “Safety strut” once and raise the body

(cargo deck) to the most raised position, then re-
hold it by the “Safety strut and safety rod”.

4. Additionally supply hydraulic operating fluid. When

the hydraulic operating fluid flows out from the level
plug, install and firmly tighten the level plug and the
oil filler port plug.

5. After having supplied hydraulic operating fluid, re-

move the “Safety strut” and store the “safety rod”.
Subsequently firmly drop the body (cargo deck)
and stop the engine.

Notice:

Supply the hydraulic operating fluid used with reference
to the following table.

Legend

1. Clutch pedal

NPA0017E

NPA0018E

NPA0019E

POWER TAKE OFF 00-9

Hydraulic Operating Fluid (Turbine Oil)

If the Dump Rise Operation is Disabled by
Itself

If the body (cargo deck) is kept being dropped and the
“Rise” operation of the body (cargo deck) is disabled by
itself, inspect the cause of rise disabled, fully identify the
status, and execute maintenance and repair in accor-
dance with the flowchart of the “Defect 1”. Dump body
rise disabled” of Chapter “Troubleshooting”.
After maintenance and repair, if there is a hindrance in
subsequent work advance because the “Rise” operation
is disabled by itself or when the hydraulic circuit is in the
following states (1) and (2) after maintenance and re-
pair, raise the body (cargo deck), take safety measures
for preventing drop, and continue the work according to
the following (item of the existence of hoist or crane
equipment) methods.

1. The body (cargo deck) rise is disabled due to the

air mixture into the hydraulic circuit resulting from
insufficient hydraulic operating fluid immediately
after repair for oil pump replacement.

2. The body (cargo deck) rise is disabled due to the

air mixture into the hydraulic circuit resulting from
insufficient hydraulic operating fluid immediately
after repair for leak of hydraulic operating fluid.

When hoist or crane equipment is provided

1. Firmly actuate the parking brake and apply a

scotch to the rear tire.

2. Set the engine to the stopped state.
3. Set the dump lever to the “Up” position and apply a

wire with ample strength to the front of the body
(cargo deck).

4. Slowly hang a wire (tensile strength of 1,000 kg

(9,807 N)) by a hoist or crane.

5. After having drawn up the body (cargo deck) to the

most raised position, prevent the drop of the body
(cargo deck) by the safety rod and the safety strut
and check safety.

Notice:

For the subsequent work procedure, supply hydraulic
operating fluid or perform air bleeding of the hydraulic
operating fluid in accordance with each item of the text
in the “Supply Procedure of Hydraulic Operating Fluid”
or the “Air Bleeding Procedure of Hydraulic Operating
Fluid”.

Manufactured by 
ShinMaywa Indus-
tries Co., Ltd.

0 to 30

°C (86°F): VG32

20

°C (68°F) or more: VG56

less than 10

°C (50°F): VG22

Legend

1. Oil level
2. Oil filler port
3. Oil tank

Legend

1. Oil level
2. Oil filler port
3. Oil tank

NPA0020E

NPA0021E

00-10 POWER TAKE OFF

If neither hoist nor crane is provided
If the body (cargo deck) is kept being dropped and the
“Up” operation of the dump is disabled by itself or if nei-
ther hoist nor crane is provided, raise the body (cargo
deck) according to the following work procedure.

Legend

1. Wire

NPA0022E