Haulotte Group HT21RT O, Maintenance Book

Page: 203 / 282

203 4000511390 E03.16 USA / GB
Upper boom
Procedure of dismantling / reassembling hydraulic rotary actuators
MS0028
2 - Before disassembly
All numbers that appear in parenthesis ( ) refer to items in parts list.
3 - Disassembly
Inspect the actuator for corrosion prior to disassembly. Severe
corrosion can make it difficult to remove the lock pins ( 109 ) and
unthread the end cap ( 4 ). If corrosion is evident, soak the lock
pins and end cap with penetrating oil for several hours before
disassembling.
Disassembly is considerably easier if the actuator is firmly
secured to the work bench. A pipe vise or mounting fixture work
well.
Avoid personal injury and machinery damage : Read the
Service and Repair Manual for proper installation,
maintenance and repair procedure.
To avoid injury or damage to product : Secure produc to
slotted table or vise.
Spraying fluids. Contents under pressure. Use caution
when removing port plugs and fittings.
N.B.-:-T
O AVOID CONTAMINATION TO MACHINED PARTS
: M
AKE
SURE WORK AREA IS CLEAN
.
1. Remove port plugs ( 106.1 ) ( 106.2 ) and drain oil. Ins-
pect oil for signs of contamination, i.e. water, metal sha-
vings.
2. Remove the cap screws ( 113 ) that cover the end cap
lock pins ( 109 ).
3. Using a 1/8" (3 mm) drill bit, drill a hole in the center of
each lock pin to a depth of approximately 3/16" (5 mm).