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Parker Commercial Hydraulics PGP030/031 Series, Service Manual

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Parker Commercial Hydraulics PGP030/031 Series Service Manual Download Page 3

3

Parker Hannifin Corporation
Gear Pump Division
Youngstown, OH

Plug 5 in position B gives clockwise rotation.

Plug 5 in position A gives counterclock-wise rotation.

Check valves in both positions give bi-directional rotation.

Items shaded apply to
multiple assemblies only.

PARTS LIST

1. Snap Ring
2. Outboard Bearing
3. Seal
4. Shaft End Cover
5. Check Assemblies

or Plug

6. Ring Seals
7. Roller Bearings
8. Pocket Seals
9. Thrust Plates
10. Integral Drive Shaft

and Gear Set

PGP030/031/050/051
Service Manual

General Instructions

These service instructions will familiarize you with
Parker's single and multiple pumps:

•

their component parts

•

the relative position of each part

•

proper methods for assembly or disassembly of
the units

To facilitate the repair of these units, and before
any work is done, we suggest that you first read
all of the steps used in disassembly and assembly.

Dirt is the enemy of any hydraulic system. The
first requirement of good maintenance of hydraulic
equipment is cleanliness. MAKE SURE YOU
DISASSEMBLE AND ASSEMBLE YOUR
HYDRAULIC EQUIPMENT IN A CLEAN AREA.

Our pictures show a Model PGP051. Notes in
the text cover variations between this unit and
the other models.

It is important to airblast all parts and wipe them
with a clean, lintless cloth before assembly.

11. Gasket Seals
12. Dowel Pins

(PGP031/051 only)

13. Bearing Carrier
14. Connecting Shaft
15. Matched Gear Set
16. Gear Housing
17. Port End Cover
18. Washers
19. Studs or Cap Screws
20. Nuts

A pump must be driven in the direction of rotation for
which it was built; otherwise, the pressure will blow
the shaft seal. Check the exploded view and notes at
right for proper direction of rotation.

Parker's Replacement Parts

Parker's replacement parts are of original equipment
standards. For assured quality of material and work-
manship, and for compatibility in assembly, USE
ONLY GENUINE PARTS.

It is a good idea to check all replacement parts
before installing them to be certain that they were
not damaged in shipment.

Service Manual HY09-SM030/031/050/051/US

General Instructions

Service Manual
Series PGP 030/031     Series PGP 050/051

USE CAUTION IN GRIPPING ALL PARTS IN THE

VISE TO AVOID DAMAGING

MACHINED SURFACES.

Summary of Contents for Commercial Hydraulics PGP030/031 Series

Page 1: ...Service Manual PGP030 031 Series PGP050 051 Series Service Manual HY09 SM030 031 050 051 US Effective August 2002 Supersedes June 1989 new photo ...

Page 2: ...systems and assuring that all performance safety and warning requirements of the application are met The products described herein including without limitation product features specifications designs availability and pricing are subject to change by Parker Hannifin Corporation and its subsidiaries at any time without notice WARNING The items described in this document are hereby offered for sale b...

Page 3: ...iness MAKE SURE YOU DISASSEMBLE AND ASSEMBLE YOUR HYDRAULIC EQUIPMENT IN A CLEAN AREA Our pictures show a Model PGP051 Notes in the text cover variations between this unit and the other models It is important to airblast all parts and wipe them with a clean lintless cloth before assembly 11 Gasket Seals 12 Dowel Pins PGP031 051 only 13 Bearing Carrier 14 Connecting Shaft 15 Matched Gear Set 16 Gea...

Page 4: ...port end cover If necessary to pry loose refer to caution note If the thrust plate remains in the gear housing it can be tapped out later with a wooden hammer handle Be careful not to distort the thrust plate 4 Lift the gear housing from the gears Take care not to damage machined surfaces For PGP031 051 Pry the gear housing from the gears and off the dowels from opposite sides taking care not to d...

Page 5: ...torting the thrust plates Visually inspect thrust plates for wear or damage Replace if necessary See page 9 Remove and discard all rubber pocket seals and gasket seals 11 Examine all roller bearings for scoring spalling or pitting If replacement is necessary remove the bearings with a bearing puller 12 It is generally advisable to replace ring seals when rebuilding the unit To replace remove the d...

Page 6: ...intless cloth before starting assembly 3 Grip the shaft end cover in a vise with the mounting face down Examine the plug or the 2 check valves to be sure that they re tightly in place Replacement is necessary only if parts are damaged Remove with a screwdriver or a special check valve tool seeTool List page10 4 If plug or check valves are being replaced screw in new parts tightly Stake the plug wi...

Page 7: ...or thrust plates are grooved on both sides For PGP031 051 the relief groove on all the unidirectional thrust plates must be towards the high pressure outlet side of the pump PGP030 050 series pump and motor plates resemble the motor plate illustration 9 Grip the shaft end cover in a vise with the mounting face down Cut 2 pocket seals 7 32 long from the pocket seal strip Grease these pocket seals w...

Page 8: ...or multiple assemblies only 16 Insert the connecting shaft in the spline of the drive gear For multiple assemblies only 17 Insert the drive and the driven gears of the second section into their respective bearings Make certain gears are in contact with the thrust plate face For multiple assemblies only 18 Slide the second section gear housing over the gears and tap it tight against the bearing car...

Page 9: ...oupling 002 wear is the maximum allowable Wear in the shaft seal areas indicates oil contamination Wear or damage to splines keys or keyways necessitates replacement Thrust Plates The thrust plates seal the gear section at the sides of the gears Wear here will allow internal slippage meaning the oil will bypass within the pump The maximum wear allowable is 002 Replace the thrust plates if they are...

Page 10: ...re are no check valves here make sure that the high pressure side of the shaft end cover is plugged Tool List Arbor press Awl 1 1 2 dia steel ball Bearing puller Owatonna Tool Co MD 956 or equivalent Clean lintless cloths Deburring tool an old file with the cutting teeth ground off Machinists hammer Soft hammer Permatex Aviation Form A Gasket No 3 Non hardening SealantTM or equivalent Medium grit ...

Page 11: ... the satisfactory performance and long life of any hydraulic system Oil should be changed in regular schedules in accordance with the manufacturer s recommendations and the system should also be periodically flushed Oil temperature in reservoir must not exceed 200 F 93 3 C with a maximum temperature of 180 F 82 2 C recommended Higher temperatures will result in rapid oil deterioration Reservoir ca...

Page 12: ... Before installing a new or rebuilt pump back off the main relief valve until the spring tension on the adjusting screw is relieved This will avoid the possibility of immediate damage to the replacement unit in the event that the relief valve setting had been increased beyond the recommended operating pressure prior to removing the old unit Before connecting any lines to the pump fill all ports wi...

Page 13: ...een reached This should take about five minutes Pump output flow should run close to rated catalog performance figures which are averaged from testing several pumps A 5 lower reading may be used as a rated minimum if new or relatively new parts have been used Worn parts which meet the guidelines for acceptable wear See page 9 may be used to rebuild the pump however the performance rating may decre...

Page 14: ...o Seller which is utilized in the notwithstanding any charges paid by Buyer Unless otherwise agreed Seller shall have the right to alter discard or otherwise dispose of any special tooling or other property in its sole discretion at any time 8 Buyer s Property Any designs tools patterns materials drawings confidential information or equipment furnished by Buyer or any other items which become Buye...

Page 15: ...g of control systems and components for aerospace and related high technology markets while achieving growth through premier customer service The Climate Industrial Controls Group designs manufactures and markets system control and fluid handlingcomponents and systems to refrigeration air conditioningandindustrial customers worldwide Parker s Charter To be a leading worldwide manufacturer of compo...

Page 16: ...Parker Hannifin Corporation Gear Pump Division 1775 Logan Avenue Youngstown OH 44501 USA Tel 330 746 8011 Fax 330 746 1148 www parker com Service Manual HY09 SM030 031 050 051 US 08 02 T M 2 5M ...

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