Service Information
40
PNEUMATIC BACKREST ADJUSTMENT
Required Tools:
1/2” Wrench
5/32” Allen Wrench
Loctite
3/32” Allen Wrench
7/32” Allen Wrench
9/16” Wrench
Adjustment Procedure:
1. For easier access, move the backrest to 75 degrees.
NOTE
Before continuing with the backrest adjustment procedure, be sure the pneumatic cylinder (item A) is com-
pletely threaded into the yoke (item B) so no threads are showing on the shaft of the cylinder. If threads are
showing, use a 3/32” Allen wrench to remove the set screw (item C) in the center of the yoke and a 7/32” Allen
wrench and 9/16” wrench to remove the nut and bolt (items D & E) holding the bottom of the pneumatic cylin-
der. Thread cylinder shaft (item A) completely into yoke (item B). Replace the nut and bolt (items D & E)
and replace the set screw (item C) using Loctite.
2. Using a 1/2” wrench, loosen the hex nut (item F) on the backrest pivot (item J) while holding the set screw
(item H) fixed in the pivot.
3. Using a 5/32” Allen wrench, turn the set screw (item H) until there is no play between the backrest release
handle (item K) and the pneumatic cylinder release button.
4. Verify the backrest will travel from flat to at least 75 degrees. If it doesn’t, turn the set screw (item H)
clockwise 1/2 turn. Repeat until at least 75 degrees of travel is achieved.
5. Lower the backrest to a 5
−
10 degree angle and release the handle. Apply approximately 50 pounds
downward force to the end of the backrest. If the backrest drifts down, turn the set screw (item H) counter-
clockwise. Repeat until the backrest does not drift downward.
6. Using the 1/2” wrench, tighten the hex nut (item F) while holding the set screw (item H) fixed in the pivot.
B
A
C
F
H
D
E
J
K
Removed head end cover
Figures 46 & 47
−
Pneumatic Cylinder and Fowler Crossbrace
(6091
−
31
−
37) for clarity
Summary of Contents for Rugged EZ-PRO R4 6092
Page 2: ......
Page 41: ...Notes 39 ...
Page 47: ...45 Maintenance Record Date Maintenance Operation Performed By ...
Page 49: ...Cot Assembly 47 6082 32 50 DETAIL 2 DETAIL 1 Assembly part number 6092 50 12 reference only ...
Page 50: ...Cot Assembly 48 Back of Fowler Foot Section Fowler Foot Section ...
Page 51: ...Cot Assembly 49 DETAIL B DETAIL C DETAIL A Detail A Detail C Detail B ...
Page 52: ...Cot Assembly 50 ...
Page 55: ...Base Assembly 53 Detail 3 Detail 1 Detail 2 Assembly part number 6092 1 11 reference only ...
Page 56: ...Base Assembly 54 DETAIL 1 DETAIL 2 DETAIL 3 ...
Page 57: ...Base Assembly 55 Apply stick wax ...
Page 58: ...Base Assembly 56 DETAIL 4 DETAIL 5 ...
Page 73: ...Litter Assembly 71 Assembly part number 6092 30 11 reference only ...
Page 74: ...Litter Assembly 72 DETAIL 1 DETAIL 2 ...
Page 75: ...Litter Assembly 73 DETAIL 3 DETAIL 4 DETAIL 5 ...
Page 76: ...Litter Assembly 74 DETAIL 6 ...
Page 115: ......