36 HARDI
®
ATV SPRAYER DIAPHRAGM OPERATOR'S MANUAL
6.5 Recommended Tire Pressure
The tires should not run under-infl ated. This only promotes instability
and rapid wear.
Do not exceed 15 mph.
6.6 Changing The Valves And Diaphragms (1203 Pump)
Note: It is recommended that if one or more diaphragms and or valves
need replacing, they should all be replaced (HARDI
®
Complete rebuild
kit for 1203 diaphragm pump - #750696).
1. Remove the valve cover 1 (Fig. 17). Before
changing the valves 2 (Fig. 17), note the
orientation of the valves so that they
are replaced correctly.
2. It is recommended to use new
O-rings 3 (Fig. 17) (part #330072)
when changing or checking valves.
3. Remove diaphragm covers 4 (Fig. 17) to
gain access to the diaphragms.
4. Remove the diaphragm bolts 5 (Fig. 17).
The diaphragms 6 (Fig. 17) may now be
changed.
5. If fl uids have reached the crankcase,
regrease the pump thoroughly. Also make
sure the drain hole at the bottom of the
pump is not blocked.
6. Reassemble with torque settings shown below.
4
1
2
3
5
6
Fig. 17
Tire size Maximum pressure
23 x 10.5 - 12 20 psi (1.5 bar)
Valve Cover
Ft/lb(Nm)
Diaphragm
Bolt Ft/lb(Nm)
Diaphragm
Cover Ft/lb(Nm)
45 (60) 45 (60) 50 (70)
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