SKF THHP 300 User manual

SKF THHP 300
Instructions for use

2 EN
Safety precautions .......................................................................................................................... 3
EU Declaration of Conformity .......................................................................................................... 3
1. Application................................................................................................................................ 4
2. Description ............................................................................................................................... 4
2.1 General description ......................................................................................................................................4
2.2 Technical data ...............................................................................................................................................4
2.3 Contents list...................................................................................................................................................5
2.4 Suggested connections................................................................................................................................6
2.5 Spare parts and optional accessories........................................................................................................6
2.6 Application connection nipples ...................................................................................................................7
2.7 Hydraulic oil...................................................................................................................................................7
3. Preventive maintenance ........................................................................................................... 8
4. Assembly and operating instructions ......................................................................................... 8
4.1 Positioning.....................................................................................................................................................8
4.2 Oil ..................................................................................................................................................................8
4.3 Prepare the application................................................................................................................................9
4.4 Connecting and using the pump ................................................................................................................9
5. Problem solving ...................................................................................................................... 10
6. Detailed dimensions ............................................................................................................... 11
Table of contents
Original instructions

3EN
READ THIS FIRST
Safety precautions
Read this instruction for use fully. Follow all safety
precautions to avoid personal injury or property
damage during equipment operation. SKF cannot
be responsible for damage or injury resulting from
unsafe product use, lack of maintenance or incorrect
equipment operation. In case of any uncertainties as
regards the use of the equipment contact SKF.
Failure to comply with the following could cause
equipment damage and personal injury.
• Do ensure that the equipment is only operated
by trained personnel.
• Do wear proper personal protective gear, such
as eye protection and protective gloves, when
operating the equipment.
• Do inspect the equipment and all accessories
carefully before use.
• Do ensure that all the air has been removed
from the hydraulic system before pressurising
the hydraulic system.
• Do prevent the workpiece (e.g. bearing,
gearwheel or similar item) from being forcibly
ejected upon sudden release of pressure
(e.g. by use of retaining nut).
• Do use clean recommended hydraulic oils
(SKF LHMF 300, LHDF 900 or similar).
• Do use a pressure gauge to monitor the oil
outlet pressure.
• Do not use damaged components or modify the
equipment.
• Do not use glycerine or water-based fluids as a
pressure medium. Premature equipment wear
or damage can result.
• Do not use the equipment above the stated
maximum hydraulic pressure.
• Do not extend the handle in order to reduce the
required force to reach maximum pressure. Use
hand pressure only.
• Do not use the pump with accessories, which
are rated below the maximum working pressure
of the injector.
• Do not use washers on sealing surfaces.
• Do not handle pressure hoses under pressure.
Oil under pressure can penetrate the skin,
causing serious injury. If oil is injected under the
skin, seek medical attention immediately.
• Do not use damaged pressure hoses.
Avoid sharp bends and kinks when connecting
hoses. Sharp bends and kinks will internally
damage the hose leading to premature failure.
Applying pressure to a damaged hose may
cause it to rupture.
• Do not lift the equipment by the hose or
couplings.
EU Declaration of Conformity
THHP 300
We, SKF MPT, Meidoornkade 14, 3992 AE Houten,
The Netherlands herewith declare under our sole
responsibility that the products described in these
instructions for use, are in accordance with the
conditions of the following Directive(s):
MACHINERY DIRECTIVE 2006/42/EC
and are in conformity with the following standards:
EN-ISO 12100:2010, EN ISO 14121-1,
ISO 4413:2010
Houten, The Netherlands, November 2020
Mrs. Andrea Gondová
Manager Quality and Compliance

4 EN
1. Application
The SKF High Pressure Pump, THHP 300, is
intended for the mounting and dismounting of
pressure joints using the SKF Oil Injection Method.
This includes such applications as couplings, gears,
pulleys, flywheels and SKF OK Couplings; where
the surface pressure is often in the region of
250 N/mm2 (250 MPa, 2500 bar, or 36 260 psi).
The high pressure generated by the THHP 300
should not be used with standard hydraulic
cylinders, jacks and other such equipment, which
generally require 70 N/mm2 (70 MPa, 700 bar,
or 10 150 psi).
2.2 Technical data
Designation SKF THHP 300
Description High pressure pump
Maximum pressure 300 MPa (43 500 psi.)
Volume per stroke 1st Stage 40 cm3(2.43 in.3)– below 1.6 MPa (232 psi.)
Volume per stroke 2nd Stage 0.5 cm3(0.03 in.3)– above 1.6 MPa (232 psi.)
Oil reservoir capacity 1.8 litres (110 in.3)/ 1.6 litres (97.6 in.3) (usable)
Weight 7.5 kg (16.5 lb) with full oil reservoir
Pressure gauge 0-300 MPa / (0-43 500psi): Diameter 100 mm (4 in.)
Accuracy 1% of full scale
Hose Length 2 m (78 in.)
Hose connection threads: G1/4 female to pump
M16 male thread with special sealing design to attach to
the quick connection coupling.
Maximum torque for M16 thread 40-50 Nm / (29.5-36.9 ft-lb)
Main dimensions of the Pump
(without hose and gauge)
574 x 130 x 200 mm ( 22.6 x 5.1 x 7.9 in.)
Dimensions of the carrying case 800 x 318 x 380 mm (31.5 x 12.5 x 15.0 in.)
Weight of the pump 7.5 kg (16.5 lb)
Weight of the full carrying case 22 kg (48.5 lb)
2. Description
2.1 General description
The SKF High Pressure Pump THHP 300 consists
of a high-pressure pump with a 0-300MPa
(0-43,500 psi) pressure gauge mounted and
includes a high pressure hose and a quick
connection coupling. A loose quick connection nipple
(THPN 300-1) is supplied and can be attached to
the G1/4 and G3/4 conversion nipples included, to
suit the application.
The design allows oil to be automatically
returned to the reservoir, once the pressure is
released, minimizing the risk of oil leakage to the
environment.

5EN
2.3 Contents list
The THHP 300 is supplied complete with the
following accessories:
I
A
H
J
E G
C
F
D
B
Fig.1 – SKF THHP 300 Content
Item Description
APump body
BHigh pressure hose (assembled)
CPressure gauge and protection sleeve (assembled)
DQuick connection coupling (assembled)
EConnection nipple M16male - G1/4male
FConnection nipple M16male - G3/4male
GQuick connection nipple (loose item)
HMounting fluid (1 litre)
ICarrying case
JInstructions for use MP5501 SKF THHP 300

6 EN
2.4 Suggested connections
The THHP comes complete with all components to
connect it to the most common applications with
G1/4 or G3/4 connections. The recommend way to
connect is shown in fig. 2 below.
F
E
G
Fig.2 – Connections
2.5 Spare parts and optional accessories
Spare parts Designation Parts
Assembly of hydraulic pump body and pressure gauge THHP 300-1 A, C
High pressure hose 2 m long THHP 300-2H (M16x1.5m – G1/4f) B
Pressure gauge (0-300 MPa/ 43500psi) 1077589 C
Pressure gauge protection sleeve TMJG 100S C
Connection nipple M16m - G1/4m THPN M16G1/4 E
Connection nipple M16m - G3/4m THPN M16G3/4 F
Quick connection coupling (loose item) THPC 300-1 D
Quick connection nipple (loose item) THPN 300-1 G
Mounting fluid (1 litre) LHMF 300/1 H
Carrying case THHP 300-9 I
Optional accessories Designation
Connection nipple M16m – G1/8m THPN M16G1/8
Connection nipple M16m - G3/8m THPN M16G3/8
Connection nipple M16m – G1/2m THPN M16G1/2
Mounting fluid (5 litre) LHMF 300/5
Dismounting fluid (5 litre) LHDF 900/5

7EN
2.6 Application connection nipples
G1A
G2
L1
L
Fig.3 – Dimensions of the THPN M16 nipples
Item A
mm
G1 G2 L
mm/in
L1
mm/in
THPN M16G1/8 Hex 22 G1/8 M16x1.5 60/2.36 15/0.59
THPN M16G1/4 Hex 22 G1/4 M16x1.5 60/2.36 17/0.67
THPN M16G3/8 Hex 22 G3/8 M16x1.5 60/2.36 20/0.79
THPN M16G1/2 Hex 22 G1/2 M16x1.5 60/2.36 20/0.79
THPN M16G3/4 Hex 32 G3/4 M16x1.5 67/2.64 30/1.81
2.7 Hydraulic oil
The pump is filled with SKF Mounting Fluid
LHMF 300.
Dirt and metal particles in the oil can cause wear of
the piston mating surfaces, leading to excessive oil
leakage and permanent damage to the THHP 300.
The recommended oil cleanliness level should meet
or exceed ISO 4406:1999 20/18/15.
Using fluids or oils, other than SKF mounting and
dismounting fluids, can cause corrosion and/or
damage to mating surfaces.
Do not mix fluids or oils of different brands.
Use appropriate oil with a viscosity of 300 cSt, at
operating temperature, to mount bearings and
similar items using the SKF Oil Injection Method.
SKF hydraulic fluids used in our pumps are
especially formulated for the mounting and
dismounting processes. In the table below is an
overview of what to use when:
Job type Environment temperatures SKF Oil
Mounting 0 °C (32 °F) to 35 °C (95 °F) SKF Mounting Fluid, LHMF 300
35 °C (95 °F) to 45 °C (113 °F) SKF Dismounting Fluid, LHDF 900
Dismounting 0 °C (32 °F) to 10 °C (50 °F) SKF Mounting Fluid, LHMF 300
10°C (50 °F) to 45 °C (113 °F) SKF Dismounting Fluid, LHDF 900

8 EN
3. Preventive maintenance
To get the best results and safest operation from
pumps, we recommend that you carry out the
following checks before connecting the pump to the
application:
• General state and cleanliness of the equipment
• Any excessive play in the movement of the
handle
• Oil leaks
• Operating efficiency of the relief valve
• Damaged or badly fitted accessories
If any products are found to be damaged or
defective, mark them clearly and store them in a
specially designated area for unsuitable material.
Consider using the SKF repair service to get it back
in good working order.
4. Assembly and operating
instructions
The pump has a stop lever clip to lock the handle.
Do not transport the product without locking the
handle (†fig. 4).
4.1 Positioning
Place the pump in a horizontal position where it is
stable and its feet are all in contact with the surface
it is standing on. Make sure there is enough space to
operate the handle over the complete handle stroke.
4.2 Oil
Remove the oil filler plug to check the oil level.
(†fig. 5). Make sure there is sufficient oil to
complete the operation. Use the appropriate oil as
described in chapter 3. The oil filler plug also works
as a safety valve. In the event that too much oil is
returned to the pump reservoir, the plug will leak
the superfluous oil to ensure that the reservoir is
not over-pressurised.
4
Fig.4 – Lever clip in locked position
5
Fig.5 – Oil filler plug

9EN
4.3 Prepare the application
Screw the appropriate THPN nipple, with G thread,
to the application. Screw on the loose quick
connection nipple (THPN 300-1) to the
THPN nipple: Maximum torque for M16 thread is
40-50 Nm / 29.5-36.9 ft-lb (†fig. 2).
For dismounting of components make sure that
with the built up of oil pressure these are not
suddenly released and can’t freely fly away from
the application. Position retaining or locknuts if
necessary.
4.4 Connecting and using the pump
1. Make sure the hose and pump are
depressurised.
2. Connect the quick connection coupling on the
hose to the quick connection nipple. Check the
locking of this connector.
3. Close the oil release valve clockwise (†fig. 6).
4. Release the stop lever clip (†fig. 7).
5. Operate the handle to pressurise the application
carefully watch the pressure increase on the
gauge and the check the application. You can
now mount or dismount your application.
6. When finished the job at hand, open the oil
release valve to depressurise the application.
6
Fig.6 – Oil release valve
7
Fig.7 – Stop lever clip in released position

10 EN
5. Problem solving
The pump does not supply oil:
• Pump relief valve open
• Badly connected couplings
• Shortage of oil in tank
• Accumulation of dirt in the circuit
The pump does not reach maximum pressure:
• Safety valve on wrong setting
• Worn or damaged seals
The circuit gradually loses pressure:
• Worn or damaged relief valve
• Air in the circuit
• Accumulation of dirt in the circuit
Oil leaks:
• Worn or damaged seals
• Badly connected couplings
The application remains pressurized:
• Relief valve not fully open
• Accumulation of dirt in the hydraulic circuit
• Restrictions in the hose

11EN
6. Detailed dimensions
Here below a drawing of the main dimensions of
the pump.
574 mm (22.6 in.)
102 mm
(4.0 in.)
436 mm (17.2 in.)
4 x 13 mm (0.5 in.)
200 mm
(7.9 in.)
130 mm
(5.1 in.)
Fig.8 – Dimensions

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MP5501 EN · 2020/12