2.Check motor brushes - when worn to 318" length replace both brushes.
BATTERY MAINTENANCE
1.Keep tops of batteries clean and dry. Use a damp cloth with a weak SOlutlOn of baking soda or ammonia and water. Use a clean dry cloth to wipe battery tops dry after cleaning.
2.If corrosion (white deposits) appears on the battery terminals and cable clamps, remove and clean. Use a battery terminal and connector cleaning tool.
DRIVE CHAIN
1.Remove left side skirt and side panel.
2.To remove chain, remove retaining clip and pull out master link.
2.Remove pulley to allow removal of left hand lift arm.
3.Remove right hand pivot bolt, bushing and lift arm.
BATTERY TERMI NAL CLEANER
3.Keep the battery electrolyte at the correct level - approximately 114" below bottom of filler tube of each cell. Dis- tilled water should be added, as needed, AFTER charging cycle.
WARNING: Do not allow electrolyte level to drop below the tops of the plates.
SERVlClNQ THE PT-20
SCRUBBER
CAUTION: Before making any adjust- ments or repairs to the machine.. .
1.Only qualified maintenance personnel are to perform repairs.
2.Make sure battery charger is dlscon- nected.
3.Make sure all switches are "OFF"
4.Remove batteries as required or dlscon- nect main battery leads from batteries when making repairs to electrical system.
VACUUM MOTOR
1.Disconnect motor leads from connector and lift out vac motor.
3.To adjust chain tension . . .
A. Remove traverse drive pulley.
B.Loosen lock nut and back out screw ( I ) turn.
C.Use a hammer and punch to rotate the eccentric bushing to tighten or loosen the drive chain.
QEAR UNIT
1.Loosen belt tension screw and remove belts.
4.To check gear unit oil level - remove Inspection plug; oil should be at the bottom of hole. To add 011, remove fill plug and add 90 welght oil as needed.
TRAVERSE DRIVE MOTOR
1.Remove lower right hand side skirt.
2.Disconnect motor leads from terminal block.
3.Remove snap ring from end of motor pivot shaft.
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