Dimensioning of hydraulic system and hydraulic pumps

It is important to dimension an optimum hydraulic system,

and to specify the correct pump size to provide sufficient

oil flow and prevent overloading of the power take-off.

Note: The body builder should enclose an information

binder, delivered with the truck, including hydraulic

system data (system dimensioning description and di-
mensioning criteria).

Service, function and safety descriptions should also be

enclosed.

Pipes, lines and hoses

Connected to the hydraulic pump are a high-pressure

hose, suction and drain lines.

When dimensioning the hydraulic system, it is important

that:

• Hoses and lines must be connected to the pump with

unions. Sealing rings must be used between pump and

union.

• Teflon tape or similar must not be used since pieces

can break off and get into the hydraulic system and

eventually cause damage.

• If steel piping is used, it must be installed so that move-
ments and vibrations do not cause leakage. Normally

hoses should be used nearest the pump.

• Oxide scale must be removed from pipes which have

been heat-bent or welded. Flush or blow the pipes

clean before installing them.

Permissible pump bending moment

The hydraulic pump mounted to a volvo power take-off

causes bending moment at the volvo power take-off.

A gearbox mounted volvo power take-off as well as an engine

mounted power take-off has the following maximum per-
missible moment:

Note: If dual mounted pumps are used, the total moment

must not exceed 40 Nm.

Hydraulic pumps

Hydraulic pumps

Abbreviations

HPE = Hydraulic pump mounted to an engine power take off (Hydraulic Pump Engine mounted).

HPG = Hydraulic pump mounted to a gearbox power take off (Hydraulic Pump Gearbox mounted).

Pump connections

There are two types of connections for hydraulic pumps:

• Plugged-in pumps

• Flange mounted

Plugged-in pumps

Plugged-in pumps are connected directly to the power

take-off via a splined shaft. Connection is done according

to DIN5462/ISO 7653 standard.

The VP1- and F1 Plus pumps are available for plugged-in

mounting.

Clutch dependent power take-off

Clutch dependent power take-offs are designed to work

when the truck is parked. Common applications are tipping

trucks, mobile cranes, tank trucks etc. They are mounted

on the gearbox and stop working when the clutch pedal is

depressed.

Note: The clutch pedal must be depressed to engage or

disengage the power take-off.

• PTR-XX

• PTRD-XX

• PTR-X T9008853

Clutch independent power take-off

A clutch independent power take-off is mainly used

when work is to be done when driving. Refrigerators,

hook lifts, concrete mixer, snow ploughs/sand spread-
ers, etc.

Gearbox PTO

These power take-offs are mounted on the front upper part

of the gearbox and are driven by the engine via the gear-
boxes’ torque converter housing..

• PTPT-D Automatic gearbox driven PTO, 1 front/upper

DIN connection for plug-in pump

• PTPT-F Automatic gearbox driven PTO, 1 front/upper

rear facing SAE flange connection for prop shaft

Engine PTO

An engine mounted power take-off is mounted on the rear

of the timing cover.

D11, D13, D16

On the D11, D13 and D16 engines the power take-off is or-
dered separately, either as:

• PTER-DIN (DIN5462/ISO7653 connection)

• PTER–100 (flange DIN 7646) (not D13)

• PTER1400 (flange SAE1400)

The hydraulic pump (variants HPEXXX) is ordered sepa-
rately on these engines together with PTO variant PTER-
DIN:

• PTER-DIN + HPEXXX

(Engine power take off together with engine mounted hy-
draulic pump)

power take-off

Power take-off

There is a number of different power take-off variants

available, with single or double outlets. The power take-
off is supplied with either a flange connection and/or a

direct connection to the hydraulic pump (opening with a

splined DIN connection).

Power take-offs are classified into two family variants:

Clutch dependent and Clutch independent

Abbreviations

PTR = Single power take-off gearbox, rear mounted (Power take-off Transmission Rear). All are rear-
facing.

PTRD = Double power take-off gearbox, rear mounted (Power take-off, Transmission, Rear mounted,

PTPT = PowerTronic power take-off (PowerTronic Power Take-off). Torque converter mounted. Available

Double).

with rear-facing flange or opening for hydraulic pump, both located at 11 o’clock as seen from rear

of gearbox — Not available for FH.

PTER = Engine mounted power take-off located at the rear end of the engine (Power Take-off Engine Rear.)

EPTT = Maximum permitted torque on engine power take off (Engine Power Take off Torque)

TPTT730 = Gearbox power take-off torque capacity 730 Nm

Volvo Power Take off

Auxiliary equipment require power take-offs, either when

the truck is stationary or when it is in motion. Various

power take-off alternatives can be chosen, depending on

the bodywork.

The work is generally carried out by equipment which is

powered by a hydraulic motor. The hydraulic motor, to-
gether with a pump and associated equipment, form the

basis of the hydraulic system. The pump, which provides

the hydraulic pressure and flow to the motor, is the heart of

the hydraulic system.

All power take-offs covered by this chapter are available

factory installed. Some variants can also be ordered from

Volvo Parts AB.

For further information about:

• Power take-offs and Hydraulic pumps, please refer

to “Product and variant information” and the

booklet “Power Take-Offs and Hydraulic Pumps”.

• Essential dimensions with the power take-off fitted to

the vehicle, please refer to “Supplementary

Drawings”

• Wiring diagram for connecting a power take-off to

Powertronic gearboxes, please refer to Body builder

instruction “Vehicle electronics”.

• Power take-off working conditions and parameter

settings, please refer to Body builder instruction “Ve-
hicle electronics”.

It is important to dimension an optimum hydraulic system,

and to specify the correct pump size to provide sufficient

oil flow and prevent overloading of the power take-off. For

recommended instructions, please refer to: “Dimensioning

of hydraulic system and hydraulic pumps”,