QSA Global, Inc.
40 North Avenue Burlington, MA 01803
888.272.2242
781.272.2000
qsa-global.com
Operations Manual
MAN-038 March 2019
Page 64 of 100
the set position. Compare the crank arm assembly to a new crank arm assembly for conformity to
shape. If required, a bent crank arm can be mounted into a vise and bent back into its original shape.
Disassemble the control crank assembly by unscrewing the six socket-head screws (part number
SCR252) using a 1/8 inch Allen wrench.
Separate the drive gear cover (steel plate, part number 95002-6) from the molded grip handle body of
the control crank. Inspect the drive gear cover plate label (part number 95007-01 or 95006-01) to
ensure the “expose” and “retract” and arrows indicating the direction of travel is legible. Replace the
operator instruction label if damaged or illegible.
Inspect the molded grip handle body (part number 95003) to ensure the tubular spacers (part number
95003-6) are all present. The tubular spacers prevent over-compression and distortion of the black
molded grip handle when the six socket-head screws are tightened. Inspect the black plastic handle
body for cracks near the conduit fittings and the ball bearing housing. Inspect the black plastic handle
body for its general condition to ensure it’s not deformed as the result from exposure to high
temperature and there are no cracks or perforations in the plastic housing that could allow the ingress
of foreign materials such as water, sand, mud or fly ash.
Disassemble, clean and degrease the drive gear (part number 95005), interior surface of the molded
grip handle and drive gear cover (part number 95002-6), the two conduit fittings and the external
surfaces of the ball bearings (part number BBS032). Inspect the ball bearings to ensure the rubber
seals are not cracked or worn through. Check the ball bearings for smooth and free movement by
holding the inner hub stationary and rotating the outer hub. These are sealed ball bearings and do not
require additional lubrication.
Inspect the two rubber seals, 15mm seal (part number RIN024) and the large O-ring seal (part
number RIN026) for cracks, cuts or abrasion that would warrant replacement. If the rubber seals are
deemed satisfactory after this inspection, apply a light coating of grease to these seals.
Clean the drive gear in solvent using a brush to dislodge any dirt between drive gear’s teeth. Inspect
the drive wheel's gear teeth looking for broken or bent teeth. If the drive wheel has broken or bent
teeth, use a file to grind the tooth flush with the drive wheel. Up to three consecutive teeth can be
missing from the drive wheel before a replacement is required.
Light rust may be removed from the wear strip using fine sandpaper and machine oil.
Lightly grease the wear strip before reassembling.
4.5.4 Reassembly of the remote control handle assembly
Install the ball bearing (part number BBS032) into the steel insert of the molded grip handle. Insert the
drive gear in the ball bearing already placed in the crank housing. Rotate the drive gear (part number
95005) to ensure free movement and proper seating. Install the second ball bearing (BBS032) onto drive
gear shaft and rotate to ensure proper seating of the installed components. Install the lubricated large
diameter O-ring seal onto the back side of the drive gear cover plate and seat into the molded grip handle
body. The serial number of the drive gear cover plate should be positioned at the five o’clock position
relative to the hand grip at the six o’clock position. Install the lubricated 15 mm rubber seal onto the drive
gear shaft while making sure it’s seated within the drive gear cover plate.
Apply Loctite 242 (GLU031) onto the first four threads of socket head screws (part number SCR252).
Ensure the tubular spacers (part number 95003-6) are all present. The tubular spacers prevent
over-compression and distortion of the black molded grip handle when the six socket-head
screws are tightened.
Install and hand tighten the six socket head screws (part number SCR252) and
flat washers (part number WSH047) into the back of the molded grip handle body using the 1/8 inch Allen
wrench. Install the crank arm assembly onto the drive gear shaft at the 9 o’clock position relative to the 6
