Hydrostatic Transmission Service, LLC Offers Denison Hydrostatic Parts and Denison Hydrostatic Repair.
Hydrostatic Transmission Service, LLC Offers Denison Hydrostatic Parts and Denison Hydrostatic Repair Revised Limits of Wear Parts
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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
No. | Qty. | Pirt No. | Description |
---|---|---|---|
1 | 1 | o33-zi2aa | Port block (P & D units) |
1 | 033-71911 | Port block (V units) | |
2 | 1 | 230-82146 | Needle bearing |
3 | 2 | 033-70502 | Check ring |
4 | 2 | 033-70489 | Clamp |
5 | 2 | 033-70908 | Face plate pins |
1 | 2 | 033-71921 | Special screw |
6 | 2 | 348-10016 | No. 10 Lock washer |
7 | 2 | S1 3-40266 | Check valve assy. (3/8-24 ext. thrds.) |
8 | 2 | 431-90404 | 1/4" Soc. pipe plugs |
9 | 1 | 488-35041 | Hollow hex plug SAE-6 |
10 | 1 | 691-00906 | O-ring 90-6290-6 |
Qty | 1 | Req'd. for items 3, 4, 5, 6 & 7 for P6V units |
No. | Qty. | Part No. | Explanation |
---|---|---|---|
1 | 4 | 306-40182 | Hex head cap screw 5/8-1 1x9 |
2 | 1 | Port block assembly (see #1 above) | |
3 | 2 | 033-49825 | Port plate pins |
4 | 1 | 033-71526 | RH port plate 6 in3 P & D units |
1 | 033-71903 | RH port plate 6 in3 V units | |
1 | 033-71525 | LH port plate 6 in3 P & D units | |
1 | 033-71904 | LH port plate 6 in3 V units | |
1 | 033-72811 | RH port plate 7.25 in3 P & D units | |
1 | 033-53388 | RH port plate 7.25 in3 V units | |
1 | 033-53776 | LH port plate 7.25 in3 P & D units | |
1 | 033-72937 | LH port plate 7.25 in3 V units | |
5 | 1 | 033-70577 | Housing gasket |
6 | 1 | S1 3-42335 | Housing assembly |
7 | 1 | See Fig. 4 | Mounting flange |
See Figure 5
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.
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.
The seal assembly (4) comes as a complete unit only.
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.
To avoid the rubber friction ring from seizing on the shaft the seal installation should be done as quickly as possible.
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.
No. | Qty. | Part No. | Explanation |
---|---|---|---|
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 |
Cautiously take away the carbon ring and the remnants of the shaft seal from the shaft.
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).
Following the shaft assembly that has been set aside, arrangement of the unit on the end with the mounting flange turned face down.
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.
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).
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.
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 |
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.
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
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).
Eradicate the eight hex head cap screws (17) and lift the whole block assembly from the port block.
Note: Seat is ready for hex wrenching. Use %" 6 point socket with %" drive.
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
pins (5) and (10) unless replacements are needed.
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.
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