Multi Pro 1750 Hydraulic SystemPage 4 − 27
Flushing the Hydraulic System
IMPORTANT: Flush the hydraulic system any time
there is a severe component failure or the system is
contaminated. Contaminated oil appears milky,
black or contains metal particles.
1. Park machine on a level surface and stop spray
pump. Stop engine, apply parking brake and remove
key from ignition switch.
2. Clean area around hydraulic filter mounting area
(Fig. 19). Remove filter and drain filter into a suitable
container. Discard filter.
3. Remove drain plug from transaxle (Fig. 20) and drain
transaxle into a suitable container.
4. Drain hydraulic system. Drain all hoses and compo-
nents while the system is warm.
5. Make sure filter mounting surface is clean. Apply
Dexron III ATF to gasket on new filter. Screw filter on un-
til gasket contacts mounting plate, then tighten filter 1/2
turn further.
6. Install all hydraulic hoses and components.
IMPORTANT: Use only hydraulic system fluid speci-
fied in Operator’s Manual (Dexron III ATF). Other flu-
id could cause system damage.
7. Fill transaxle with new fluid (Dexron III ATF).
8. Disconnect and ground spark plug wires to prevent
engine from starting.
9. Turn ignition key switch to START; engage starter for
ten (10) seconds to prime hydraulic pump. Allow starter
to cool and then repeat this step again.
10.Connect spark plug wires.
11.Start engine and run at low idle speed for a minimum
of two (2) minutes.
12.Increase engine speed to high idle for minimum of
one (1) minute under no load.
13.Turn steering wheel in both directions several times.
Operate spray boom lift cylinders several times.
14.Shut off engine and check for oil leaks. Check oil lev-
el in transaxle and add correct oil if necessary.
15.Operate the machine for two (2) hours under normal
operating conditions.
1. Hydraulic filter
Figure 19
1
1
Figure 20
3
1. Transaxle drain plug
2. Dipstick/filler
3. Strainer
1
2
16.Check condition of hydraulic oil. If the fluid shows any
signs of contamination repeat steps 1 through 15 again.
17.Resume normal operation and follow recommended
maintenance intervals.
Hydraulic
System
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