16
1.
Always stop the pump at the bottom of its' stroke when you take a break at the end of the day.
This helps keep material from drying on the rod and damaging the packings.
2.
Keep the displacement pump packing nut/wet cup 1/3 full of TSO at all times. The TSO helps protect
the packings and rod.
3.
Inspect the packing nut daily. It should be tight enough to stop leakage, but no tighter. Overtightening
will damage the packings.
FIG. 6
1 oz. SAE 30 W oil - semi-
annually
Fill Plug - unit has grease in gearbox from
factory and will not require changing.
(Grease - PN 301-178)
Bleed (Weep) Hole
Sealed Bearing
1. LUBRICATION
- This motor is supplied with pre-lubricated ball bearings, lubricated for the life of the
bearing.
2. MOTOR BRUSHES
need periodic inspection and replacement as wear indicates. Brush wear is
greatly influenced by individual application. it is recommended that brush wear be checked at early
intervals of operation in order to determine future required inspection. Standard Leeson brushes have
an initial length of 1 and 1/4". When the brushes are worn to a length of 5/8" they should be replaced.
TO CHANGE THE BRUSHES:
1. Unplug the machine.
2.
Remove the cover over the motor.
3.
Open the two covers at the rear of the motor.
4.
Loosen the screw under the brush.
5.
Pull out the wire.
6.
Push the brush retainer clip in and withdraw.
7.
Remove the worn brushes.
8.
Install new brushes in the reverse order.
For long life, new brushes (Part No. 301-146 for 110V service, Part No. 301-147 for 220 - 240 V service)
need to have a run in period. After changing brushes, set the machine for spraying. With a bucket of Coro-
Chek and water, a 50' 1/4" airless hose, airless gun and tip on unit, open the prime valve and switch on.
The pump will now prime. With pump running in the prime mode, turn the pressure control knob to high pres-
sure. (The pump has to cycle fast with no pressure in the pump). Now run the pump for 20 minutes.
After 20 minutes, the brushes will be run in.
Oil Impregnated sleeve
Dip in hot 10 W oil when removed
REGULAR MAINTENANCE
OIL AND LUBRICATION INSTRUCTIONS
ELECTRIC MOTOR MAINTENANCE
