Pump Service Manual
XD5-100-A1
Phone: (402) 727-9700
Website: www.Oilgear.com
905 S. Downing Street, Fremont, NE 68025
Page 24 of 31
Issue Date: 1/4/2021
910003
Filtration
Keep the fluid clean at all times to ensure long life from your hydraulic system. Refer to the referenced Oilgear Filtration
Recommendations bulletin 90007. Oilgear recommends use of a filter in the pressure or return line. Replace filter
element(s) when the filter condition indicator reaches change area at normal fluid temperature. Drain and thoroughly
clean filter case. Use replacement element(s) of same beta 10 ratio (normally a ratio of 4 with hydraulic oils).
Fluid Cooling
When the pump is operated continuously at the rated pressure or frequently at peak load, auxiliary cooling of the fluid
may be necessary. Fluid temperature should not exceed limits specified in the referenced Oilgear Fluid
Recommendations Bulletin 90000.
Air Breather
On most installations, an air breather is mounted on top of fluid reservoir. It is important for the breather to be the
adequate size to allow air flow in and out of reservoir as fluid level changes. Keep the breather case filled to the “fluid
level” mark. About once every six months, remove cover, wash screen in solv
ent and allow screen to dry, clean and refill
case to level mark and install screen. Refer to the manufacturer's recommendations.
Fluid: Filling and Starting Recommendations
Refer to instruction plate on the unit, reservoir, machine and/or reference, Fluid Recommendations bulletin. Fire
resistant fluids and phosphate ester fluids can be used in accordance with fluid manufacturer's recommendations.
1.
Pump all fluid into reservoir through a clean (beta 10 ratio of 4 or more) filter. Fill reservoir to, but not above,
“high level” mark on the sight gauge.
2.
Remove case drain line and fill the pump case with hydraulic fluid.
3.
Turn drive shaft a few times by hand with a spanner wrench to make sure parts rotate. Torque to turn drive shaft
should be 9 to 24 ft*lbs. (12 to 32 N*m)
With pump under minimum load:
4.
Turn drive unit ON and OFF several times before allowing pump to reach full speed. The system can usually be
filled by running the pump and operating the control.
The fluid level in the reservoir should decrease. Stop the pump. DO NOT allow the fluid level to
go beyond the “low
level.” If the level reaches “low level” mark, add fluid and repeat step.
With differential (cylinder) systems, the fluid must not be above “high level” when the ram is
retracted
or below “low level” when extended. Bleed air from the
system by loosening connections or opening
petcocks at the highest point in the system. Close connections or petcocks tightly when solid stream of
fluid appears.