Multiquip 21362 manual Before removing the blades, Re-Assembly, Testing, Changing a Blade

HPLA/HPHA-SERIES 36"TROWEL — MAINTENANCE

2.Trowels manufactured prior to June of 1982 require that the distancefromtheendoftheadjustingboltandthefixturearm must be 7/8" (Figure 45).Conversely, trowels manufactured after June of 1982 require that the distance from the end of the adjusting bolt and the fixture arm must be 1/2".

3.Un-screwthelockingboltsontheadjustmenttool,andplace the trowel arm into the adjustment fixture channel as shown in (Figure 48). A thin shim may be required to cover the blade holes on the trowel arm. Make sure to align the trowel adjustment bolt with the fixture adjustment bolt.

4.Using an allen wrench, tighten the locking bolts on the adjustment tool and securely lock the trowel arm in place.

5.Loosen the locking nut on the trowel arm lever, then turn the trowel arm adjusting bolt until it barely touches (.010") the adjusting bolt on the fixture.

6.Afterthecorrectadjustmenthasbeenmade,tightenlocknut on trowel arm lever to lock in place.

7.Loosen locking bolts on adjustment fixture, and remove trowel arm from fixture.

8.Repeat steps 2-7 for the remaining trowel arms.

Re-Assembly

1.Clean and examine the upper/lower wear plates and thrust collar.Examine the entire spider assembly.Wire brush any concreteorrustbuild-up.Ifanyofthespider componentsare found to be damaged or out of round, replace them.

2.Makesurethatthebronzetrowelarmbushingisnotdamage or out of round.Clean the bushing if necessary.If the bronze bushing is damage or worn, replace it.

3.Reinstall bronze bushing onto trowel arm.

4.Repeat steps 2 -3 for each trowel arm.

5.Make sure that the spring tensioner is in the correct position to exert tension on the trowel arm.

6.Insertalltrowelarmswithleversintospiderplate(withbronze bushingalreadyinstalled)usingcaretoaligngreaseholeon bronze bushing with grease hole fitting on spider plate.

7.Lock trowel arms in place by tightening the hex head zerk grease fitting and jam nut.

8.Re-install the blades back onto the trowel arms.

9.Install stabilizer ring onto spider assembly.

10.Reinstall lower wear plate, thrust collar and upper wear ringinthereverse order thattheyweredis-assembledonto the spider shaft. Make sure that there is little or no lateral movement between the thrust collar and the spider shaft.

11.Carefully lift the upper trowel assembly, line up the key- way on gear box main shaft and insert into spider assembly.

12.Reinstall square head cone point into spider plate and tighten in place.Tighten jam nut. Use care in making sure point of set screw engages groove in gear box main shaft.

13.Lubricate all grease points (zerk fittings) with premium "Lithum 12" based grease, conforming to NLG1 Grade #2 consistency.

Testing

1.Place trowel in test area, start engine and test trowel for smoothness.

2.If trowel bounces has excessive vibration or does not run smoothly repeat alignment procedure.

Changing a Blade

Whiteman recommends that all the blades be changed at the same time.The machine may wobble or bounce if only some of the blades are changed at one time.

1.Place the machine on a flat, level surface. Adjust the blade pitch control to make the blades as flat as possible. Note the blade orientation on the trowel arm.

Before removing the blades,

NOTE please note the orientation of the blade on the trowel arm.

2.Remove the three bolts and lock washers that secure the blade to the trowel arm. Remove the blade.

3.Usingawirebrush,scrapeallconcreteparticles andforeign debris from the trowel arm.

4.Install the new trowel blade onto the trowel arm. Make sure blade is installed correctly, maintaining the proper orienta- tion for direction of rotation.

5.Reinstall the three bolts and lock washers that secure the blade to the trowel arm.Tighten all three bolts securely.

6.Repeat steps 2-5 for all remaining blades.

HPLA/HPHA-SERIES 36" WALK-BEHIND TROWEL — OPERATION AND PARTS MANUAL — REV. #3 (07/06/10) — PAGE 35