TEDA XQ140 - Page 21

MODEL XQ140/20 HYDRAULIC POWER TONG OPERATION MANUAL
YANCHENG TEDA DRILLING & PRODUCTION EQUIPMENT CO.,LTD
5.5 Repairing gear disengagement
The gear mechanism must be
repaired when the gear is
disengaged. The method is:
dismount location seat ((XQ20-50)
or tail seat (XQ20-56), take out the
location block (XQ20-48) and spring
from the positioning seat or tail
seat, temporarily install a proper
shim at the joint between the
positioning seat and the spring, then
remount.
Note: The shim should not be too thick, otherwise it will be hard or unable to shift
gears.(see Fig.5-8)
5.10 Gear shifting operation
There are two shifting handles, upper-handle and lower handle. Four shifts are available
by changing handle positions. Each handle position at different shifts is shown below as
in Fig. 315-9
Gears
Low gear
Second low
gear
Second high
gear
High gear
Highest
rotating speed
14
24
42
72
Handle
positions
Location block
Tail seat
Location seat
Fig.5-8
Fig.5-9
Fig.5-7