Mytee T-REX Technical Support

TECHNICAL SUPPORT

T-REX™ TOTAL ROTARY EXTRACTOR

General Troubleshooting

Problem: Possible Causes: Solutions:

Motor fan is spinning but cleaning
head is not.

Pinion gear has broken.

IMPORTANT: Do not plug the motor into power directly. Serious damage to the motor

will result. The machine should only be powered through the lighted pigtail coming o

the handle.

Replace the pinion gear.

(Part # H129. See next page.)

TS-TREX-09/02/15 • PAGE # 1

How to Replace Pinion Gear for T-REX™ with 1/2 HP Motor

Does not apply to T-REX™ Jr.

Step 1: Remove the four bolts holding the

transmission and motor together.

Step 2: Pull the motor o the transmission. You

can use a rubber mallet to loosen the seal if
necessary (Figure A).

Step 3: Use a Phillips head screwdriver to

unscrew the 6 screws on the transmission cap
(Figure B). Remove the transmission cap.

Step 4: Remove the broken pinion gear.

Step 5: Install the new pinion gear (Part # H129)

by inserting the gear side into the space beside
the large transmission gear. Use the existing
grease inside the transmission to lube the
pinion gear (Figure C). Twist the pinion gear to

make sure the gears are aligned. You should

see the large gear spin a little (Figure D).

Step 6: Make sure the wave washer is centered

on the bearing for the large gear (Figure E). Line
up the pins on the transmission casing with the
holes on the transmission cap and tap the cap
into place (Figure F). The transmission should
be on a surface that allows the threaded shaft
on the bottom to hang free so that it doesn’t

push back up against the cap as you’re trying
to tap the cap back on (Figure G).

A

C

E

H129

Pinion Gear

B

D

F

Step 7: Replace the screws with a Phillips

screwdriver. The longer screw goes in the hole
in the motor cavity.

Step 8: Twist the pinion gear by hand to make

sure it is aligned properly. You will see the

bearing for the main gear spin slightly.

Step 9: Match the locking key on the motor

shaft to the key slot on the transmission and
slide the motor back in place (Figure H). Line
up the bolt holes and make sure the power
cord is coming out the back.

G

H

TS-TREX-09/02/15 • PAGE # 2

T-REX™ JR. TOTAL ROTARY EXTRACTOR

General Troubleshooting

Problem: Possible Causes: Solutions:

Gear box is making loud grinding

noise while running. (When gears

are properly working, the motor

will run quietly.

Oset gear is damaged.

Replace the gear.

(Part # H237. See next page.)

TS-TREX-09/02/15 • PAGE # 3