We service Denison hydrostatic pumps

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.	Qty.	Part Number	Explanation
1	1	513-45381	Barrel & sleeve assy only
1	1	S13-43965	Barrel & sleeve assy only
2	1	033-71603	Auxiliary drive shaft
3	1	033-71562	Holddown spring
4	1	033-71561	Barrel stop
5	1	033-71560	Spring retainer
6	1	033-71564	Retaining ring

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

• Place housing (1) on a flat area with the large open end up.
• 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 two dowel pins (4) in the blind holes in the same pad.
• DO this (step 3) on the opposite side of the housing.
• Fit together O-ring (5) and plug (6) in the bottom of housing. Roll pins (3) are in the bottom half of the housing.

Housing Assembly S13-43962 Parts List

No.	Qty.	Part Number	Description
1	1	033-71578	Housing
2	1	033-71516	Bearing
3	2	325-16320	Roll pin
4	4	324-21608	Dowel gin
5	1	691-00912	0-rmg
6	1	488-35014	Plug

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

USUAL PRESSURES

• Servo—160 psi -(-case psi -(-62.5 psi per 1000 system pressure.
• Replenishment—180-220 psi + Case Pressure.
• Servo—300 psi + case
• psi +40 psi per 1000 system pressure.
• Case—75 psi continuous 125 psi intermittent