Parker 716 Series User manual

Low Speed
High Torque
Hydraulic Motors
716 Series
Service Manual SM1532
Parker Motors
Effective: January 1, 1996

Parker Hannifin Corp.
Hydraulic Pump/Motor Div.
Greeneville, TN 37745 USA
2
Definitions
WARNING: A WARNING refers to procedures that must be followed for the
safety of the equipment operator and the person inspecting or
repairing the motor.
CAUTION: A
CAUTION refers to a mandatory procedure which avoids damage
to the motor or other system components.
NOTE: A
NOTE provides key information to make a procedure easier or
quicker to complete.
WARNING
FAILURE OR IMPROPER SELECTION OR IMPROPER USE OF THE PRODUCTS AND/OR
SYSTEMS DESCRIBED HEREIN OR RELATED ITEMS CAN CAUSE DEATH, PERSONAL
INJURY, AND PROPERTY DAMAGE.
This document and other information from Parker Hannifin Corp., its subsidiaries and authorized
distributors provide product and/or system options for further investigation by users having
technical expertise. It is important that you analyze all aspects of your application and review the
information concerning the product or system in the current product catalog. Due to the variety
of operating conditions and applications for these products or systems, the user, through its own
analysis and testing, is solely responsible for making the final selection of the products and
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 Corp. and its subsid-
iaries at any time without notice.
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DG 6/96 7500
Parker Hannifin Corporation
Hydraulic Pump/Motor Division
2745 Snapps Ferry Road
Greeneville, TN 37745 USA
Tel. [phone]
FAX [phone]

Parker Hannifin Corp.
Hydraulic Pump/Motor Div.
Greeneville, TN 37745 USA 1
Section 1 General Information Page
Definitions .............................................................................Inside Front Cover
Introduction...................................................................................................... 2
Troubleshooting Guide .................................................................................... 3
Troubleshooting Check List ............................................................................. 4
Tools and Material Required for Servicing & Seal Kit Components .................. 5
Service Parts List............................................................................................. 6
Exploded Assembly View.............................................................................. 7-9
Section 2 Repair
Disassembly & Inspection......................................................................... 10-15
Assembly.................................................................................................. 16-21
Solenoid Assembly .........................................................................................22
Final Checks...................................................................................................23
Section 3 Maintenence
Hydraulic Fluids ..............................................................................................23
Filtration, Operating Temperature ...................................................................23
Tips for Maintaining the system ......................................................................24
CONTENTS

Parker Hannifin Corp.
Hydraulic Pump/Motor Div.
Greeneville, TN 37745 USA
2
Introduction
Service Manual for Series 716 Two Speed High Torque Motor
This service manual has one purpose: to guide you in maintaining, troubleshooting,
and servicing the 716 Two Speed High Torque Motor. These motors provide long
life while operating with low radial side loads.
Read the trouble shooting information to eliminate non-hydraulic causes and
hydraulic system problems. The check list identifies hydraulic system and possible
motor component problems.
The two column format of the Disassembly and Inspection, and Assembly sections
make it easier to conduct major work on the motor. Column one explains the
procedure in detail. Column two illustrates this procedure with photographs. Read
all material carefully and pay special attention to the notes, cautions, and warnings.
The component part names and item numbers assigned on the exploded assembly
views corresponds with names and item numbers (in parentheses) used in the
disassembly and assembly procedures.
Service part number charts display exploded view item numbers and part numbers.
Obtain service parts from the Original Equipment Manufacturer or your local Parker
distributor.
We welcome suggestions to make this manual clearer or more complete. If you are
stuck, contact Parker Hannifin Corp. at the Hydraulic Pump/Motor Division. Don’t
second guess the manual. Following this safe and productive procedure results in
restoring the reliable long-life operation engineered into the motor.

Parker Hannifin Corp.
Hydraulic Pump/Motor Div.
Greeneville, TN 37745 USA 3
NOTE: Before troubleshooting any system problem, check service literature published by
the equipment and/or component manufacturers. Follow their instructions, if given,
for checking any component other than the motor unit.
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!
Troubleshooting Guide
Preliminary Checks
Hydraulic systems are often trouble free. Therefore
check the following easy to check items first, such as:
•Parts damaged from impact that were not properly
repaired, or that should have been replaced.
•Improper replacement parts used in previous
servicing.
•Mechanical linkage problems such as binding,
broken parts or chain , loose parts, or slipping
belts.
Hydraulic Components
If the motor has low speed or torque, look at the check
list on the next page first. Since these motors main-
tain volumetric and torque efficiencies during their
useful life, the problem is usually elsewhere in the
hydraulic system.
However, there are hydraulic system problems which
can drastically reduce the long life designed into these
motors. Three key areas to check are:
•Temperature: Do not exceed 180°F.
•Fluid: Viscosity at the maximum temperature must
exceed 50 ssu.
•Filtration: A Beta 25 ratio of at least 2.
Preparation
Make your troubleshooting easier by preparing as follows:
•Work in a clean, well lighted area.
•Have proper tools and materials nearby.
•Have an adequate supply of clean petroleum - based
solvent.
•Prior to any motor disassembly, plug the open ports
and case drain.
•Clean all dirt from the outside of the motor.
•Prior to assembly lightly oil all seals, rollers, rolls and
the threaded bolt ends.
WARNING: Since solvents are flammable, be
extremely careful when using any
solvent, even a small explosion or
fire could cause injury or death.
WARNING: Wear eye protection and comply
with OSHA and other maximum air
pressure requirements.

Parker Hannifin Corp.
Hydraulic Pump/Motor Div.
Greeneville, TN 37745 USA
4
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Troubleshooting Checklist
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CAUTION: Seals in the system will shrink, harden or crack if fluid temperatures exceed 180°F
(82.2°C), resulting in loss of ability to seal.

Parker Hannifin Corp.
Hydraulic Pump/Motor Div.
Greeneville, TN 37745 USA 5
Tools and Materials Required to Service the 716 Series
•Clean, petroleum-based solvent
•Emery paper
•Vise with soft jaws
•Air pressure source
•Screwdriver
•Tape
•Breaker bar or impact wrench
•Torque wrench 50 ft. lbs
•Socket 1/2 inch
• 1/4 inch Allen wrench
• Adjustable crescent wrench or hose fitting wrenches
Service Tools & Materials, Seal Kit
Seal Kit Seal Kit-Complete: 2550
Includes; P/N Qty Description
1046 6 Body O-Rings
1141 1 Dust Seal
2332 1 High Pressure Seal
032841 5 Solenoid Block O-Rings
1156 1 Bearing

Parker Hannifin Corp.
Hydraulic Pump/Motor Div.
Greeneville, TN 37745 USA
6
Item # Qty Part Number Description
1 8 See Below Bolts
2 1 M110C-6 4 Dowel End Cover (standard)
3 6 1046 O-Rings
4 1 See Below IGRTM Set, Rear (2904-X)
5 2 1660 Clip
6 1 See Below Shaft
7 2 1865 Commutator Plate
8 4 1021 Check Ball
9 1 PA-2534 (7/8-14 O-Ring, Pilot Act.) Center Block
PA-2535 (7/8-14 O-Ring, Solenoid)
PA-3106 (BSPP, Pilot Act.)
PA-3111 (BSPP, Solenoid)
PA-2817 (Manifold, Pilot Act.)
10 1 PA-2532-2 (1/4-19 BSPP) Front Bearing Housing/Flange
1 PA-2532-1 (7/16-20 O-Ring)
11 1 1825 (open center) Valve
1 2792 (closed center)
12 2 75013-10 Plug, Spool Port
13 1 1826 Spring
14 1 1156 Bearing
15 4 1320 Check Balls-Solenoid Block
16 5 032841 O-Rings-Solenoid Block
17 1 See Below IGRTM Set, Front (2917-X)
18 1 1824 (with manual override) Solenoid
2891 (without manual override)
19 2 021442 Bolt, Hex
20 1 1141 Seal, Dust
21 1 2332 Seal, High Pressure
25 1 1823 Solenoid Block
Motor Item 6 Item 17 Item 4 Item 1
Disp. Shaft IGRTM Set IGRTM Set Hex Bolt
3.6/7.2 2216-072 2917-1 2904-1 021363
5.4/10.8 2216-108 2917-2 2904-2 021428
7.1/14.2 2216-142 2917-3 2904-3 021356
8.8/17.6 2216-176 2917-4 2904-4 021306
10.6/21.2 2216-212 2917-5 2904-5 021382
12.9/25.8 2216-258 2917-6 2904-6 021437
716 Series Service Parts List

Parker Hannifin Corp.
Hydraulic Pump/Motor Div.
Greeneville, TN 37745 USA 7
Item Description
No.
1 Bolt, Hex
10 Front Bearing Housing/Flange
3O-Ring
17 IGRTM Set
6 Shaft
7 Commutator Plate
8 Check Ball
9 Center Block
12 Plug, Spool Port
20 Seal, Dust
21 Seal, High Pressure
17
14
3
3
1
20
21
10
8
7
3
6
9
12
Locating Ring
w/Rollers
Outer
Inner w/Rolls
Valve Plate
716 Exploded View - Typical
Flange End

Parker Hannifin Corp.
Hydraulic Pump/Motor Div.
Greeneville, TN 37745 USA
8
6
2
3
1
5
3
12
9
3
7
8
4
5
Item Description
No.
1 Bolt, Hex
2 Cover
3O-Ring
4IGR
TM Set
5 Clip
6 Shaft
7 Commutator Plate
8 Check Ball
9 Center Block
12 Plug, Spool Port
716 Series Exploded View - Typical
Cover End

Parker Hannifin Corp.
Hydraulic Pump/Motor Div.
Greeneville, TN 37745 USA 9
Solenoid Block
Bottom View
Item Description
No.
12 Plug, Spool Port
13 Spring, Valve
11 Valve
15 Check Ball, Solenoid Block
16 O-Ring Solenoid
25 Solenoid Block
18 Solenoid
19 Hex Bolt
11
13
25
12
18
19
15
16
716 Series Exploded View - Typical
Optional Solenoid

Parker Hannifin Corp.
Hydraulic Pump/Motor Div.
Greeneville, TN 37745 USA
10
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Disassembly and Inspection
(Preparation Before Disassembly)
•Before you disassemble the motor unit or any of its components read this entire
manual. It provides important information on parts and procedures you will need
to know to service the motor.
•Refer to page four for tools and other items required to service the motor and
have them available.
•Thoroughly clean off all outside dirt, especially from around fittings and hose
connections, before disconnecting and removing the motor. Remove rust or
corrosion from coupling shaft.
•Remove coupling shaft connections and hose fittings and immediately plug port
holes and fluid lines.
•Remove the motor from system, drain it of fluid and take it to a clean work
surface.
•Clean and dry the motor before you start to disassemble the unit.
•As you disassemble the motor clean all parts, except seals, in clean petroleum
based solvent, and blow them dry.
WARNING: SINCE THEY ARE FLAMMABLE, BE EXTREMELY
CAREFUL WHEN USING AND SOLVENT. EVEN A
SMALL EXPLOSION OR FIRE COULD CAUSE INJURY
OR DEATH.
WARNING: WEAR EYE PROTECTION AND BE SURE TO COMPLY
WITH OSHA OR OTHER MAXIMUM AIR PRESSURE
REQUIREMENTS.
CAUTION: Never steam or high pressure wash hydraulic
components. Do not force or abuse closely fitted parts.
• Keep parts separate to avoid nicks and burrs.
• Discard all seals and seal rings, as they are removed from the motor. Replace all
seals, seal rings and any damaged or worn parts with genuine Ross or OEM
approved service parts.

Parker Hannifin Corp.
Hydraulic Pump/Motor Div.
Greeneville, TN 37745 USA 11
(Reference Exploded Assembly View)
1. Mount the motor in a soft jawed vice, shaft up, clamping on the
cover assembly. Remove manifold port o-rings if applicable.
SEE FIGURE D1
2. Remove the 8 5/16-24 bolts (1)SEE FIGURES D2.
3. Lift front bearing housing/flange (10) by lightly tapping the flange
up off the dowels with a soft hammer. Do not remove the dowel
pins., SEE FIGURES D3.
4. Remove the locating ring carefully to prevent rollers from falling
or remove rollers with a magnet. SEE FIGURE D4.
Caution: The rollers & check balls will fall out so
be ready to catch them to prevent
damage and loss.
Note: The check balls may fall into the bolt
holes or into the commutator ports.
Figure D4
Figure D3
Figure D2
Figure D1
Disassembly and Inspection

Parker Hannifin Corp.
Hydraulic Pump/Motor Div.
Greeneville, TN 37745 USA
12
Figure D5
Figure D7
Figure D8
Figure D9
Figure D6
Disassembly and Inspection
5. Remove outer, rolls, inner and valve plate. SEE FIGURES
D5, D6, D7.
6. Remove commutator plate assembly (7) and seal (3). SEE
FIGURE D8.
7. Turn motor assembly upside down and clamp center block (9)
in vise. SEE FIGURE D9.

Parker Hannifin Corp.
Hydraulic Pump/Motor Div.
Greeneville, TN 37745 USA 13
8. Loosen and remove the 8 5/16-24 bolts (1), remove the cover
(2), locating ring, check valve balls (quantity 2) (8) and rollers.
SEE FIGURES D10 & D11.
CAUTION: The rollers will fall out so be ready to catch
them to prevent damage and loss.
9. Remove the outer, rolls, inner and valve plate.
SEE FIGURE D12.
10. Lift shaft (6) up a short distance, push the valve plate down and
remove the 2 snap ring pieces (5). SEE FIGURE D13.
Note: With the snap ring removed the shaft will fall
out of the motor unless, you maintain a grip
on the it.
Figure D10
Figure D11
Figure D12
Figure D13
Disassembly and Inspection

Parker Hannifin Corp.
Hydraulic Pump/Motor Div.
Greeneville, TN 37745 USA
14
Disassembly and Inspection
Figure D14
Figure D15
11. Rremove the valve plate. Lift and remove shaft (6). SEE
FIGURE D14.
12. Remove commutator plate (7) and seal (3).
13. If the locating ring and front bearing housing (10) did not
seperate when the front bearing housing was removed they
can be seperated by holding the locating ring by hand and
tapping the cover with a soft nose hammer.
Caution: If placed in a vise, use minimal clamping
force to prevent a permanent out of round
condition.
SEAL REMOVAL
(700 Series Flange shown for illustration purpose only)
14. Remove dust seal (20) by leveraging it outward.
15. To remove the high pressure lip seal, the roller bearing must
first be removed. Use a suitable bearing puller while taking
care not to damage the flange. Once the bearing is removed,
the seal can be pushed out of the flange using a blunt instru-
ment. SEE FIGURE D15.
Caution: Do not scratch the flange seal area that would
possibly create a leak path.

Parker Hannifin Corp.
Hydraulic Pump/Motor Div.
Greeneville, TN 37745 USA 15
Disassembly and Inspection
Figure D16
Figure D17
Figure D18
Figure D19
Pilot Option
To change pilot from normally parallel to normally series or vice
versa. Also valid for solenoid shift motors.
1. Remove the plugs (12) on the center block (9).
SEE FIGURE D16.
2. Remove the spool (11) and spring(13). SEE FIGURE D17.
3. Looking at the port surface, install the spool with ...
A) the “double” or "wide" land nearest the “pilot port” for
normally parallel operation. SEE FIGURE D18.
B) the “double” or "wide" land opposite the “pilot port” for
normally series operation. SEE FIGURE D19.
4. The spring is always located on the side, opposite the “pilot port”.
SEE FIGURES 18 & 19.
The disassembly of the motor is completed.
PARTS INSPECTION
Inspect the shaft for a smooth polish in the bearing and seal areas.
If scratched, polish with fine emery paper in circumferential direc-
tion. If pitted, or if scratches are deep, replace shaft and check the
rest of the motor for scratches, galling, or contamination damage.
Replace parts as needed.
If your motor has a thru shaft option and the seals were leaking,
the entire cover must be replaced. Thru covers contain no
servicable parts.

Parker Hannifin Corp.
Hydraulic Pump/Motor Div.
Greeneville, TN 37745 USA
16
Replace all seals and seal rings with new ones each time you reassemble the motor unit. Lubricate all seals
and seal rings with oil or clean grease before assembly.
NOTE: Individual seals and seal rings as well as a complete seal kit are available. The parts
should be available through most OEM parts distributors or Parker distributors.
(Contact your local dealer for availability.)
NOTE: Unless otherwise indicated, do not oil or grease parts before assembly.
Wash all parts in clean petroleum-based solvents before assembly. Blow them dry with compressed air.
Remove any paint chips from mating surfaces and from port and sealing areas.
WARNING: SINCE THEY ARE FLAMMABLE, BE EXTREMELY CAREFUL WHEN USING ANY
SOLVENT. EVEN A SMALL EXPLOSION OR FIRE COULD CAUSE INJURY OR DEATH.
WARNING: WEAR EYE PROTECTION AND BE SURE TO COMPLY WITH OSHA OR OTHER
MAXIMUM AIR PRESSURE REQUIREMENTS.
Motor Assembly
PROCEDURE
1. Before assembling the flange seals and bearing, visually inspect
the flange bores for deep scratches, raised material of sharp
edges that would interfere with assembly or cause leaks.
2. Using a suitable installation tool, press the high pressure lip seal
(21) into the seal bore ( the longer, internal bore) and bottom it
against the shoulder. The seal must be installed with the inside
lip pointing towards the inside of the motor. Using an arbor press
and suitable bearing installation tool, the bearing (14) can then
be pressed in after the seal .065" to .085" below the face of the
flange.
3. Install the dust seal (20) using a suitable seal driver in the
outside seal bore of the flange. The dust seal should be installed
with the inside lip facing away from the flange and flush with the
flange face.
4. Position the center block so the piolt port or solenoid ports are on
your right and lock in the vise. SEE FIGURE A01.
5. Place the o-ring (3) in center block seal gland. SEE FIGURE
A02 Figure A02
Figure A01