TM 10-3930-659-20 17-11.    CARRIAGE ASSEMBLY REPLACEMENT (Con't). 5. Attach  suitable  lifting  device  to  carriage  tilt  cylinder  (15)  and  raise  lifting  device  enough  to  support  weight  of carriage tilt cylinder. NOTE Quantity  of  spacers  (14)  may  vary.    Note  number  and  position  of spacers to aid during Installation. 6. Remove screw (10), washer (11), spacer (12), pin (13), carriage tilt cylinder (15), and spacers (14) from carriage (8).  Lower and rest carriage tilt cylinder on wooden blocks.  Remove lifting device from carriage tilt cylinder. 7. Attach suitable lifting device to carriage (8) and raise lifting device enough to support weight of carriage. WARNING Use extreme caution when handling heavy parts.  Lifting device Is required  when  parts  weigh  over  50  lb  (23  kg)  for  a  single  person lift, over 100 lb (45 kg) for a two person lift, and over 150 lb (68 kg) for a three or more person lift.  Keep clear of heavy parts supported only  by  lifting  device.    Failure  to  follow  this  warning  may  cause serious Injury or death to personnel. NOTE Quantity of washers (16) may vary.  Note number and position of washers to aid during Installation. 8. Remove  two  screws  (21),  washers  (20),  spacers  (19),  pins  (18),  washers  (16),  and  carriage  (8)  from  two fork/boom assemblies (17). 9. Remove lifting device from carriage (8). b. INSTALLATION WARNING Use extreme caution when handling heavy parts.  Lifting device Is required  when  parts  weigh  over  50  lb  (23  kg)  for  a  single  person lift, over 100 lb (45 kg) for a two person lift, and over 150 lb (68 kg) for a three or more person lift.  Keep clear of heavy parts supported only  by  lifting  device.    Failure  to  follow  this  warning  may  cause serious Injury or death to personnel. 1. Attach suitable lifting device to carriage (8) and position carriage on two fork/boom assemblies (17). 2. Apply a coat of grease to surface of two pins (18). 17-36