13.After the hydraulic system starts to show signs of fill, actuate lift control lever until the lift cylinder rod moves in and out several times. If the cylinder rod does not move after 10 to 15 seconds, or the pump emits abnor- mal sounds, shut the engine off immediately and deter- mine cause or problem. Inspect for the following:
A.Loose filter or suction lines.
B.Loose or faulty coupler on the pump.
C.Blocked suction line.
D.Faulty charge relief valve.
E.Faulty charge pump.
14.If cylinder moves in 10 to 15 seconds, proceed to step 15.
15.Operate the traction pedal in the forward and re- verse directions. The wheel off the floor should rotate in the proper direction.
A.If the wheel rotates in the wrong direction, stop engine, remove lines from rear of pump, and re- verse the connections.
B.If the wheel rotates in the proper direction, stop engine and adjust the spring adjusting pin lock nut.
16.Adjust traction pedal to the neutral position (see Ad- just Traction Pedal for Neutral).
17.On the SP 2020/3020, install engine shield and piv- ot seat down. On the SP 5020, secure panel to right side of machine with cap screws.
18.Check operation of the traction interlock switch (see Check Interlock System in Chapter – 5, Electrical Sys- tems).
19.Remove block from wheels and lower machine. Re- move chocks from remaining wheels.
20.If the traction pump or a wheel motor was replaced or rebuilt, run the traction unit so all wheels turn slowly for 10 minutes.
21.Operate traction unit by gradually increasing its work load to full over a 10 minute period.
22.Stop the machine. Check tank and fill if necessary. Check hydraulic components for leaks and tighten any loose connections.
Hydraulic System (Rev. A) | Page 4 – 32 | Sand Pro 2020/3020/5020 |
