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Hydrostatic Transmission Service LLC
Hydrostatic Transmission Service,LLC Offers Denison Hydrostatic Parts and Denison Hydrostatic Repair
1. Put in the port block (1) on a clean flat area
with the two open ports up. THE OTHER SIDE OF THE FACE MUST NOT BE SCRATCHED OR DAMAGED. PLACE needle bearing (2) on tool (Figure T-5) with the labeled end of the bearing next to the shoulder on the tool and press the bearing (2) into the port block. The bearing must be .010-025 below the surface.
2. Condense check ring (3) and slip into the two1.50" ports and corresponding holes in the ring with theside holes in the port wall.
3. Need lock washers (6) on particular screws (5). Put in(5) throughout the port wall and drilled holes in checks (3)and thread into clamps (4). Torque to 10ft. ids. There is only need for one check assembly on open loop pumps.
4. Strand the socket pipe plugs (8) into port block.
5. Pass through two check valve assemblies (7) intovalve face of port block.
6. Place O-ring (10) on hollow hex plug (9) andthread into tapped hole in top of the portblock.
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Fast Turn Around
MOUNTING PORT BLOCK ASSEMBLY See Figure 8
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.
USE CARE TO AVOID DAMAGE TO THE VALVE MOUNTING AREA WHILE
PUTTING TOGETHER AND TORQUING THE TWO
Port block (P & D units)
Port block (V units)
No. 10 Lock washer
Check valve assy. (3/8-24 ext. thrds.)
1/4" Soc. pipe plugs
Hollow hex plug SAE-6
Req'd. for items 3, 4, 5, 6 & 7 for P6V units
Hex head cap screw 5/8-1 1x9
Port block assembly (see #1 above)
Port plate pins
RH port plate 6 in3 P & D units
RH port plate 6 in3 V units
LH port plate 6 in3 P & D units
LH port plate 6 in3 V units
RH port plate 7.25 in3 P & D units
RH port plate 7.25 in3 V units
LH port plate 7.25 in3 P & D units
LH port plate 7.25 in3 V units
See Fig. 4
Hydrostatic Transmission Service,LLC Offers Denison
Hydrostatic Parts and Denison Hydrostatic Repair
See Figure 5
1. 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 andplace 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).
Hydrostatic Transmission Service,LLC
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.
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.
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.
No. 1 Splined Shaft Assy. See Fig. 1
No. 2 Keyed Shaft Assy. See Fig. 1
Shim (use only 1)
Retaining Ring (use only 1)
Seal Retainer Gasket
10-24 x 2-V. Soc. Hd. Cap Screw
3/8-16 x 1-% Hex Washer Hd. Screw
Output Control Assy.
Input Control Assy.
3/8-16 x 3% Hex Hd. Cap Screw
*Some controls use gasket 033-53575 in lieu of O-Rings
Hydrostatic Transmission Service,LLC Offers Denison Hydrostatic Parts
And Denison Hydrostatic Repair
Cautiously take away the carbon ring and the remnants of the shaft seal from the shaft.
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.
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).
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.
Port plate face
Cylinder barrel face
Shoe retainer face
Piston shoe face (pocket)
Creep plate face
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. Lay aside the O-ring (37) and replenishing releasevalve (41). Examine the orifices (12) visually to insurethey are open. Do not remove unless damageor 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.
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 areneeded.
BARREL HOLODOWN AND GEROTOR ASSEMBLY See Figure 9
1. Removing the four screws (1) that secure the portblock (2) to the housing (6). Use the correct measures whengetting rid of screws on valve block side to preventmarring 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 theport block.
4. Next take away the needle bearing (2) from the port block.5. Then eliminate two screws (5), lock washers (6), check
1. Take away face- plate (2, fig. 6) from face of barrelassembly.
2. Get rid of the barrel assembly (1, fig. 4) by graspingthe auxiliary shaft and lifting the whole assembly 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.
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We offer hydraulic pump repair hydrostatic drive repair hydraulic transmission repair hydraulic motor repair hydraulic equipment repair for the following
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2835 Westover Park Suite A Tupelo, MS 38801Phone: (662) 680-8899Toll Free: (800) 361-0068
Email: [email protected]
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