AAA-055-00188
Jaylor Owner Manual
-49-
5000 Series Truck Mount Models
Hydrostatic oil reservoir
24.9.1 System Hydraulic Oil
– Change Interval Information
The hydraulic oil used in the hydraulic systems on your Jaylor truck mount was selected for its heavy-
duty operating properties. This minimizes frequent hydraulic oil changes and extends the life of the
hydraulic system components.
It is recommended to change the hydraulic oil every
5000 hours
of regular use, or when oil properties
degrade. If the fluid becomes black, this is a sign of overheating. If the fluid appears milky, this is a sign
of water contamination.
If in doubt as to the condition of your hydraulic oil, contact your authorized Jaylor dealer and/or distributor
or your local hydraulic service center. A sample of the hydraulic oil can be tested with the correct testing
equipment. Good condition hydraulic oil must meet the following minimum requirements:
1. Water Content in Hydraulic Oil < 100 Parts/Million
2. Viscosity of Hydraulic Oil
10% of Original Specification
3. ISO Oil Cleanliness Standard of 18/13
24.9.2 Changing Hydraulic Oil and Reservoir Maintenance
The following steps should be followed to change the hydraulic fluid and clean the reservoir:
use Figure
23 for reference
.
1. Position a large capacity catch container under the reservoir below the drain plug. The volume of
the hydraulic reservoir is large; make sure the selected container is suitable for this service.
Model:
Approx. Reservoir Capacity:
5425 & 5575
226 L (60 US gal.)
5650, 5750, 5850
340 L (90 US gal.)
51000, 51250
340 L (90 US gal.)
2. Open the supply line shutoff valves.
3. Remove the drain plug and allow oil to drain.
4. Dispose of the used oil in an environmentally safe manner.
5. Remove and inspect the reservoir supply strainers:
a. Disconnect the hoses from the supply line shutoff valves.
b. Un-fasten fittings and shutoff valves if necessary, to access to the supply line strainers.
c. Remove the strainers by turning the large hexagonal flange on the bottom of the unit
counterclockwise until it is free from the reservoir.
d. Thoroughly inspect the strainers for foreign matter and/or damage.
e. If the strainers are undamaged, clean them with a degreasing solution and a brush. If there are
any signs of damage, replace with a new unit. See
Section 0
for replacement information.
f.
Re-install the strainers, valves, fittings and hoses. Use pipe thread sealant on all threaded
connections.
6. Re-install the drain plug. Use pipe thread sealant on the threads of the drain plug.
7. Remove and inspect the oil reservoir breather cap. See
Section 24.11
for further instruction.
8. Add new, filtered hydraulic oil of the appropriate specification through the breather port. Add oil
slowly and carefully to avoid spillage. Continue filling the reservoir until the oil level gauge on the
side of the reservoir indicates that it is full.
9. Close the supply line shutoff valves.
10. Place oil catch containers under the connections between supply line hoses and pumps.
11. Loosen the supply line hose fittings at the pump-ends.
12. Have an assistant open and close the supply line shutoff valves to control the flow of hydraulic oil.
Flush old oil out of the hoses.
13. Tighten the supply line hose fittings at the pump-ends.
14. Make sure the supply line shutoff valves are fully open.
