We have many Denison Pump Parts.

Denison Hydraulic Piston Pumps or Denison Hydrostatic Piston Pumps and Denison Hydraulic Motors or Denison Hydrostatic Motors
PF & MF 04      PF & MF 08        PV & MV O7        PV 6

PF & MF 05      PF & MF 09        PV & MV 08        PV 10/15

PF & MF 06      PV & MV 05       PV & MV 09        PV 20/29

PF & MF 07      PV & MV 06       PXX 1223          Gold Cup Series

1. Fit in the barrel (1) with the bores facing
down on a clean area.

Place the hold down spring (3) into barrel counter-
bore.
Put in spring retainer (5) into counter bore and
seat next to spring.
Place the retaining ring (6) into barrel counter-
bore groove. Align retaining ring so that it is fully
seated in groove.
Fix the barrel stop (4) over auxiliary drive
shaft (2). Rotate barrel on side and put the auxiliary
drive shaft and barrel stop into the barrel
spline and hold down spring.

PARTS LIST

Guidelines for Replenishing Circuit Isolation Plug

WARNING
The isolation plug together with this is to be used only if an external filter circuit is not offered DO NOT operate this unit with the isolation plug put in unless an outside line has been provided.

When the outer filter circuit is not used, dispose of the isolation plug.

When the outside filter circuit is used, fit the isolation plug under the plug in the face of the port block. Use a 3/16″ hex wrench, 4″ minimum in length. Insert the isolation plug and tighten to 80-120 in./lbs. torque.

Warning

Filter should have a bypass and bypass indicator and Hydrostatic Transmission Service,LLC which offers Denison recommends that it be sized four times for projected flow.

HOUSING ASSEMBLY S13-43962

1. Place housing (1) on a flat area with the
large open end up.
2. Push the bearing (2) into the housing bore
until seated. IT IS NOT RECOMMENDED THAT HAMMERING OR BEATING THE
BEARING INTO PLACE.
Put housing on side and install roll pin (3)
into the hole in control cover pad. Roll pin
ought to be installed 3/8″ under pad surface. Place
1. two dowel pins (4) in the blind holes in the same pad.
4. DO this (step 3) on the opposite side of the
housing.
5. Fit together O-ring (5) and plug (6) in the bottom of
housing. Roll pins (3) are in the bottom half of
the housing.

PARTS LIST – Housing Assembly S13-43962

Caution
Be sure the Loose Pin is retained in the Port when putting together the System Pressure Gage

Replenishment—None

Servo—160 psi -(-case psi -(-62.5 psi per 1000 system pressure.
Case—40 psi max.

USUAL PRESSURES
Closed Loop

Open Loop

Replenishment—180-220 psi + Case Pressure.
Servo—300 psi + case
psi +40 psi per 1000 system pressure.

Case—75 psi continuous 125 psi intermittent

Revised Limits of Wear Parts

PROBLEM SHOOTING

Part problems and circuit problems are frequently inter-related. A faulty circuit may work with obvious success but will cause failure of a particular part within it. The part failure is effect, not the reason of the problem. This broad guide is on hand to help in locating and eliminating the cause of problems by studying their effects.

Barrel and Stroking Assembly to Mounting Flange

• 1. Establish straight thread connectors (3) and O-
  rings (4) into threaded holes in cradle.
• 2. Fit in right and left hand pressure feed tubes
  (5 and 6) to connectors (3). Tighten connectors
   till it is snug.
• 3. Place the mounting flange (9) with the large
  open end facing up and Put together two dowel pins
  (8) in the cradle mounting area and four
  locating sleeves (10) in the outer edge of the
  flange.
• 4. Mount the rocker cam and cradle assembly (7)
  over the dowel pins (8) in the mounting flange.
• 5. With  cam  and  cradle  put in, place
  mounting flange on the side and install two
  3/8-16 x 2 screws through the seal retainer
  surface into the cradle. These screws do hold in
   the rocker cam assembly in
  place and will be taken out later.
• 6. Bring back the mounting flange to an straight up an down position
  and slant the rocker cam to both extremes of 
  attitudes in the cradle.
• 7. Situate the barrel and auxiliary shaft assembly
   (1) directly over the pistons. Beginning with
  the uppermost piston, steer them one at a
  time into the barrel bores. Going back to the cam to a
  level position in the cradle.
  
  
• PARTS LIST
  

  No.	Q!y.	Pirt No.	Explanation
  1	1	See Fig 3	Barrel & auxiliary shaft ass y
  2	2	033-71609	Override pressure lubes
  3	2	492-15265	Connector
  4	2	691-00902	0-ring
  5	1	S1 3-43967	Tubing ass y (right sidei
  6	1	S1 3-43966	Tubing ass y (left sidei
  7	1	See Fig. 2	Rocker cam & stroking ass y
  8	2	324-23216	Dowel pin
  9	1	033-71546	Mounting flange
  10	4	033-72664	Locating sleeve

• No.	Qty.	Pirt No.	Description
  1	2	033-49825	Face plate pins
  2	1	033-71921	Barrel face plate P1 1 P only
  	1	033-71575	Barrel (ace plate P1 4P only
  3	1	033-71602	Housing gasket
  4	1	See Fig. 5	Housing assembly

  
  
  

  Hydrostatic Parts and Denison Hydrostatic Repair

  1. Put in the faceplate pins (1) in the holes given
  in the barrel face.
  2. Apply lubrication to the surface of the barrel
  and place l the faceplate (2) over the faceplate
  pins.
  Warning
  Make certain the faceplate is correctly seated on the barrel and pins with the steel side towards the barrel face. The faceplate has one side bronzed and this should be toward the port plate. If needed, remove coating from edge of plate to settle on bronze side.
  3. Put in gaskets (3) over the two dowel pins in
  the mounting flange.
  Put together the housing assembly (4) over the bar
  rel and auxiliary shaft assembly. Cautiously
  guide the override tubes and pressure feed
  tubes (items 2, 5 and 6, Figure 4) into the
  housing assembly. Place the pressure feed
  tubes in the slots in the housing face
  
  Guidelines for Replenishing Circuit Isolation Plug

  WARNING The isolation plug together with this is to be used only if an external filter circuit is not offered DO NOT operate this unit with the isolation plug put in unless an outside line has been provided.
  	When the outer filter circuit is not used, dispose of the isolation plug. When the outside filter circuit is used, fit the isolation plug under the plug in the face of the port block. Use a 3/16″ hex wrench, 4″ minimum in length. Insert the isolation plug and tighten to 80-120 in./lbs. torque. Warning Filter should have a bypass and bypass indicator and Hydrostatic Transmission Service,LLC which offers Denison recommends that it be sized four times for projected flow.

  
  

  Barrel and Auxiliary Shaft Assembly

  1.  Fit in the barrel (1) with the bores facing
     down on a clean area.

  • Place the hold down spring (3) into barrel counter-
    bore.
  • Put in spring retainer (5) into counter bore and
    seat next to spring.
  • Place the retaining ring (6) into barrel counter-
    bore groove. Align retaining ring so that it is fully
    seated in groove.

  Fix the barrel stop (4) over auxiliary drive
  shaft (2). Rotate barrel on side and put the auxiliary
   drive shaft and barrel stop into the barrel
  spline and hold down spring.

  • PARTS LIST
    

    No.	a piip	». P14P	Part Number	Explanation
    1	1	–	513-45381	Barrel & sleeve assy Pi 1 P only
    	–	1	S13-43965	Barrel & sleeve assy PHP only
    2	i	1	033-71603	Auxiliary drive shaft
    3	i	t	033-71562	Holddown spring
    4	1	1	033-71561	Barrel stop
    5	1	1	033-71560	Spring retainer
    6	i	1	033-71564	Retaining ring

Put the pump with the unplugged hole in the housing assembly at the 12 o’clock spot.

Place the gasket (5) on the housing assembly (6).

Mount the two special pins (3) in the face of the port block assembly. Submit an application of petroleum jelly or heavy grease to    the plate (4) and pose port plate over the pins (3) on the port block.

Slip the port block assembly and port plate over the end of the secondary shaft. Always make certain that tubes 2, 3 and 4 shown on Fig. 4 are seated and that the port plate (4) is at rest on the pins (3).

As soon as the pump is correctly assembled, the valve-mounting surface will be at the top of the unit.

Fit the four bolts (1), and torque to 150ft. Ibs.

Warning

                           USE CARE TO AVOID DAMAGE TO THE VALVE MOUNTING AREA WHILE

PUTTING TOGETHER AND TORQUING THE TWO

TOP BOLTS

HOUSING ASSEMBLY

• 1. Place housing (1) on a clean flat area
  with the large open end up.
• 2. Put bearing (2) in the housing bore. Put in
  Pressing Plug tool (figure T-4) in the bearing.
  With an even amount of steady pressure, press the
  bearing into the housing bore until seated.

•    HAMMERING OR BEATING INTO PLACE IS NOT RECOMMENDED
• 3. Rotate housing (1) on side and put together roll pin (4)
  in the Vi” through hole in the control cover pad.
  The pin needs to be 3/8″ under the pad area.
  THE PIN END SHOULD NEVER COME IN CONTACT WITH
  THE INTERNAL BEARING CAGE. Take two
  dowel pins (3) in the blind holes in the same pad.
• 4. Do this operation 3 on the opposite side of the
  housing.
• REVISE LIMITS OF WEAR PARTS
• REVISE LIMITS OF WEAR PARTS
• REVISE LIMITS OF WEAR PARTS
• REVISE LIMITS OF WEAR PARTS
• 5. Put O-ring (5) on plug (6) and place in
  bottom of housing (1). (Roll pins (4) are in
  bottom half of housing.)
  

  Put the three faceplate pins (1) in the holes that are in the barrel face.

  2. Put a generous amount of grease to the face of the barrel and
  place the face plate (2) over the pins (1) in the barrel.

  Always check to make sure the faceplate is properly seating on the barrel and pins with the steel side facing the barrel face. The Series 7.25 has only one side bronzed and this should be toward the port plate. If essential, remove coating from edge of faceplate to establish bronze side.

  3. Put in the  gasket  (3) over the two dowel pins(item 6 on Fig. 4) in the mounting flange

  4. Position the Housing assembly (4) over the Barrel and Auxiliary Shaft assembly and carefully guide the pressure tubes and tube lines (items 2, 3 and 4 on Fig. 4) through the Housing assembly (4).

  Situate the pump in an horizontal position with the port block inlet and outlet pads turned facing down.

  Setup the shaft and bearing (1) assembly in the mounting flange and cradle. Always check to see that there are no burrs or sharp edges on shaft seal surface of the shaft.

  For a stiff shaft application use the shim (2) that results in the smallest amount clearance around the shaft bearing. It is very important not to use a shim with a floating shaft.

  Fit the snap ring (3) in the mounting flange to keep the Shaft Assembly. Always line up the ring so that it is fully seated in the groove. The ring with the tightest fit is going to give the best results.

  Warning

  Previous to installing the seal assembly inspect all the parts. The lapped seal seat and the carbon ring have a meticulousness finish that must be handled with care. .Certainty that both parts are free of scratches, marks and cracks.

  Rest the spring retainer (e) over the shaft and alongside the retaining ring on the shaft assembly. Situate the spring (d) alongside the retainer (e). Apply grease to the inside surface of the rubber friction ring (f) and arrange the shell containing the rubber friction ring (f) and carbon ring (c) over the shaft with the carbon ring uncovered. Apply grease to the square segment rubber seal (a) and fit on the cast iron seat (b). Insert the seat and seal in the seal retainer (6) with the lapped side of the seat in position to contact the carbon ring. Place the seal retainer assembly and gasket (5) over the shaft with the lapped surface beside the carbon face. Set the four gaskets (7) on the four screws (8) and include the seal retainer (6). Lower the seal retainer only far as necessary to start the four screws and tighten equally. Torque to 10 ft. Ibs.

  NOTE

  To avoid the rubber friction ring from seizing on the shaft the seal installation should be done as quickly as possible.
  
  COUNTER-BALANCE SERVO STEM ASSEMBLY

  Consign the two spacers (11) on the two screws (12) and put in through the balance plate (10) and servo stem (9).

  Introduce these parts through the opening in the side of the housing assembly and place the screws over the two 10-24 tapped holes in the rocker cam.

  Embrace these parts adjacent to the cam and alternately tighten the screws (12) to hold the assembly steadfastly in place. Torque screws to 5 ft. Ibs.
  
  

  PARTS LIST
  

  No.	Qly.	Part Number	Explanation
  1	1	S13-41805	No. 1 Splined Shaft Assy. See Fig. 1
  	1	S15-41806	No. 2 Keyed Shaft Assy. See Fig. 1
  2	1	033-53948	Shim
  	1	033-53949	Shim (use only 1)
  3	1	033-53901	Retaining Ring (use only 1)
  	1	033-53902	Retaining Ring (use only 1)
  	1	033-53903	Retaining Ring (use only 1)
  4	1	62340006	Shaft Seal
  5	1	033-70549	Seal Retainer Gasket
  6	1	035-70516	Seal Retainer
  7	4	631-45003	Nyltite Gasket
  8	4	306-40144	Screw
  9	1	033-71312	Servo Stem
  10	1	033-70546	Balance Plate
  11	2	033-71247	Spacer
  12	2	358-10300	10-24 x 2-V. Soc. Hd. Cap Screw
  13	8	631-45007	Nyltite Washer
  14	8	353-25018	3/8-16 x 1-% Hex Washer Hd. Screw
  15	1	See Below	Output Control Assy.
  16	1	See Below	Input Control Assy.
  17	8	306-40184	3/8-16 x 3% Hex Hd. Cap Screw
  18	1	671-00017	O-Ring’
  19	1	671-00048	O-Ring”

  *Some controls use gasket  033-53575 in lieu of O-Rings

  
  Cautiously take away the carbon ring and the remnants of the shaft seal from the shaft.
  

  Warning

  • Do not scratch seal exterior of shaft when removing seal.
  • Eradicate the snap ring (3) and the shaft and bearing assembly (1) and take away shim (2).

  HOUSING I

  Following the shaft assembly that has been set aside, arrangement of the unit on the end with the mounting flange turned face down.

  • 1. Pressing the ends of the small tube lines away from
    the housing.
  • 2. Raise up the housing from the mounting flange, eliminate
     the gasket, and dowel pins from the
    mounting flange.
  • 3. Do not take away the roll pins and the bearing
    from the housing unless the bearing has been damaged
    and needs to be replaced.
  • ROCKER CAM AND CONTROL STROKING ASSEMBLY

  Get rid of the whole assembly from the mounting cap and place on a clean flat surface with the two tubes (2) in a straight position and located at the top. Label the cam (24) and cradle (20) as indicated in Figure 3.These labels can decide positioning of parts during reassembly.

  Cautiously remove the small tube lines (3) and (4) from the cradle.

  IT IS IMPORTANT NOT TO BEND THE LINES.

  Arranging of the assembly in an erect position on the flat surface of the cradle (20). Do away with the retaining ring (1) and thrust washer (2). Along with the piston and shoe assembly (4) and the creep plate (5) from the cam (24). With awareness remove the two setscrews (6a) and two screws (6) that secure the servo plate to the cam (24) and lay aside the servo input parts (7, 8 and 9).

  Remove the four 7/16″ screws (10) and eight V*” screws (11) and (12) from the control covers (15R) and (15L). and the four dowel pins (16), remove the two chambers (17), remove the two special seals (18) and the four steel balls (19). Also remove the two vane seal cartridge assemblies (23) and the four-holddown vanes (22) from the rocker cam (24).
  
  

  NOTE

  A number of units may have thin shims under the hold-down vanes.

  Eradicate the rocker cam (24) from the cradle (20). DO NOT TAKE THE PLUGS FROM THE ROCKER CAM.

• REVISE LIMITS OF WEAR PARTS
  

  6 and 7.25 in.3	Original Dimension	Max. Rework From Original Dimension	Min. Dimension After Rework
  Port plate face	.315/.305″	.010″	.295″
  Cylinder barrel face	4.480″	.010″	4.470″
  Shoe retainer face	.314/.312″	.005″	.307′
  Piston shoe face (pocket)	.019/.014″	.011/.006″	.008″
  Creep plate face	.293/.291″	.010″	.281″
  Face plate		None	Replace

  Unit Disassembly The directions enclosed in this section cover a entire break up of the subject pump. Disassemble only as far as required to replace or repair any worn parts. DISASSEMBLY Place pump unit so that valve block assembly is on top. Work on a clean work area such as a stable work station competent enough of supporting the unit

  CONTROLS See Figure 11 Take away the four screws (14) from the side (16) and do away with the input shear seal valve assembly. Do away with the four screws (14) from the side cover (15) and eliminate the counter balance shear seal assembly. Take away the two screws (12) and take out the servo stem (9) and balance plate (10).   VALVE BLOCK See Figure 11 1. Eradicate the eight hex head cap screws (17) and lift the whole block assembly from the port block. VALVE COVER See Figure 10 1. Take out the four screws (39) to divide the cover (21) from the block (11). Do not take away the check valves (19), 2. Place aside the plugs (43), (36) and pin (40). Put aside the 8-32 nut from the bottom of cover (21) to remove filter assembly (34). 3. Put housing (29) and O-Ring (28), items (30)7^(31), (32) and (33) as a unit. Put in a small brass rod thru the hole in the housing and tap out piston (27) and O-ring (26). 4. Place a spring (25) and cone (24). Take away the seat (23) and O-ring (22). Note: Seat is ready for hex wrenching. Use %” 6 point socket with %” drive. VALVE BLOCK 1. Lay aside the O-ring  (37) and replenishing release valve (41). Examine the orifices (12) visually to insure they are open. Do not remove unless damage or clogging is visible. 2. Springs need to be removed (16), (17) and (18). Next the  retainer (15) and poppets (13) arid (14) have to go. RETAINER PLATE 1. Set aside the four screws (4) from the plate (6) and (11), gasket (7). Doing away with the seats (8) and (9). Do not eliminate Rolf 1. pins (5) and  (10) unless replacements are needed.

  BARREL HOLODOWN AND GEROTOR ASSEMBLY See Figure 9 1. Taking away the snap ring (17), end cover (15) and “O” ring (16). 2. Removing the pin (14), retainer ring (18), hold down nut (13), thrust washers (10), bearing (11) and seal ring (12).   3. The pressure plate needs to be moved away from (9), Gerotor side plate (5a) “O” rings (7) and (8), needle bearing (5b). 4. Do away with the Gerotor assembly (3), dowel pin (4), key (2), and side plate (1). PORT BLOCK See Figure 8 1. Removing the four screws (1) that secure the port block (2) to the housing (6). Use the correct measures when getting rid of screws on valve block side to prevent marring valve block face. 2. Taking away the port block (2), gasket (5), port plate (4) and port plate pins (3). Note: port plate will in some instances hold on to the port block upon disassembly. See Figure 7 3. Remove the check valve assemblies (7) from the port block. 4. Next take away the needle bearing (2) from the port block. 5. Then eliminate two screws (5), lock washers (6), check rings (3), and clamps (4). Only one check ring assembly in open loop pumps. BARREL AND AUXILIARY SHAFT 1. Take away face- plate (2, fig. 6) from face of barrel assembly. 2. Get rid of the barrel assembly (1, fig. 4) by grasping the auxiliary shaft and lifting the whole assem bly out of the housing. DRIVE SHAFT See Figure 11 Take away the four screws (8) and gaskets (7). Eriadicate seal retainer (6), and the stable part of the shaft seal (4). Refer to view of item 4.