Repair manual

Spiders and Gearboxes CRT Repair
wc_tx000583gb.fm 52
6. Spiders and Gearboxes
6.1 Gearbox Basics
See Graphic: wc_gr001579
Rotation of the gearboxes differs depending on which side of the trowel
the gearbox is located. When viewed from the operator’s position,
gearboxes located on the right-hand side of the trowel rotate
counterclockwise; gearboxes on the left-hand side of the trowel rotate
clockwise.
The rotors (“spiders”), which hold the blades, require proper timing so
they will not interfere with each other during operation.
Anytime the drive line is worked on or gearboxes are removed, timing
of the spiders should be checked.
To time the spiders:
6.1.1 Elevate the trowel off the ground. Use either the dolly jack wheels or
place the trowel on blocks.
6.1.2 Disconnect one of the universal joints from one of the gearboxes.
6.1.3 Rotate the input shaft of the disconnected gearbox until the blades
align as shown.
6.1.4 Reconnect the universal joint.