Dover TWG TULSA WINCH 707W Руководство по эксплуатации - Страница 11
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1. Evenly remove four capscrews
pressure will raise the cover as the capscrews are loosened. Remove the cover from the brake
housing.
2. Remove the springs
spring should measure at least 1.200 inches with no force on them.
3. Remove the brake piston
bottom of two spring pockets. Using jam nuts, screw the all-thread pieces in evenly until the
piston is clear of the housing. An alternate way of removing the piston is to use a portable
power unit or shop air to slowly pressurize the brake cavity until the piston is out of the bore.
4. Remove the brake driver/clutch assembly
(Item 21)
housing
.
5. Remove the stator plates
check them for excessive wear, then replace if necessary. Additionally, check the top stator
plate for scoring caused by the removal tools and polish if necessary. Friction discs should
measure no less than 0.055 inches thick and stator plates should measure no less than 0.064
inches thick.
6. If necessary, remove the seal
7. If the brake housing
housing where the seal
8. Carefully disassemble the brake driver/clutch and note the side in which the markings on the
(Item 34)
clutch
are facing
facing the proper direction in order for the hoist to function properly. Inspect the surface on
the input and brake drivers
pitting or spalling on the drivers then both it and the clutch must be replaced.
9. Re-assemble the driver/clutch assembly, making sure that the clutch is installed properly.
(Item 7-5)
10. Install a new seal
hoist, temporarily install the input sun gear
driver/clutch assembly onto the sun gear spline.
11. Install the stator plates
with a stator and alternating friction discs and stator plates. There is one more stator plate
than friction disc so you will finish with a stator plate.
12. Coat the new oil seals
for proper installation
13. Carefully install the piston
until it is seated.
(Item 24)
14. Install the springs
position, coat the bottom of each spring with chassis lube to keep it in position.
SERVICING THE BRAKE
(Item 11)
holding the brake cover
(Item 24)
from the piston
(Item 10)
by installing two pieces of 3/8"-16NC all-thread in the
(Items 13, 14, 15, 17, 34, and 38)
(Item 19)
and friction discs
(Item 7-5)
from the brake housing.
(Item 21)
is removed from the hoist, examine the journal on the brake
(Item 7-3)
runs for wear. If severely worn, replace the brake housing.
.
The clutch assembly must be re-assembled with the markings
(Items 13 & 38)
into the brake housing. If the brake housing is removed from the
(Item 19)
and friction discs
(Item 7-4)
with light oil and install onto the piston
.
(Item 10)
into the brake housing
into the spring pockets of the piston. If working in a horizontal
11
(Item 20)
(Item 10)
and check the free height. Each
(Item 18)
from the brake housing and
(Item 34)
where the clutch
(Item 8)
into the brake housing and slide the
(Item 18)
into the brake housing starting
(Item 21)
in place. Spring
from the brake
runs. If there is any
(Item 10)
See Fig. 5
.
and gently tap it down