Paccar Braden BP200, Installation Maintenance And Service Manual

24

Support the diamond screw and remove the level wind
support bracket from the winch and slide the carrier
assembly off of the slide bars.  The slide bars can now
be removed, if required, by driving out the rollpin at the
chain case end.  If the bearing or seal on the chain case
end of the diamond screw need to be replaced, the
chain case cover must be removed.  Refer to “Level
Wind Drive Coversion” on page 19.  With the chain case
cover removed, remove the chain, sprocket and bushing
from the diamond screw.  Remove the retaining ring
from the diamond screw bearing.  Support the diamond
screw and gently tap the diamond screw out of the end
bracket.  The bearing and seal can now be replaced.
Install the diamond screw, bearing and retaining ring.  
Thoroughly clean and inspect the support bracket for
signs of damage.  Inspect and replace the seal in the
bracket if required.  Thoroughly clean and inspect the
bearing, and replace if required.

There are two drag brake cylinders on BP200B winches,
one above, and one below the motor.  Both are serviced
in the same manner.  Early model BP200 winches have
only one cylinder.

Remove the lines from the drag brake cylinder.  Remove
the four (4) capscrews and lockwashers holding the
cylinder to the end bracket and remove the cylinder.

Remove the worn brake disc from the cylinder.  Inspect
the cylinder for signs of oil leakage and/or physical dam-
age.  Replace the cylinder if required.

Install a new brake disc onto the cylinder rod.  

Check the surface of the drum flange that the brake disc
rubs against to be sure it is free of any rust, burrs, deep
grooves, etc. that might damage the new brake disc.

Re-install the cylinder onto the winch end bracket and
re-connect the lines to it.

Check diamond screw end play with a dial indicator.
End play should be between 0.010 and 0.015 in. (0.25 -
0.38 mm).  Adjust end play with shims under the hand-
wheel cover.  Apply grease through the grease fitting to
fill the bearing cavity.  Install the handwheel and rollpin.
Disengage the diamond screw and rotate the handwheel
to be sure the diamond screw and carriage operate
smoothly.  Install the bushing, sprocket and chain onto
the end of the diamond screw.  Install the chain case
cover as described in “Level Wind Drive Coversion” on
page 21.

REPLACING THE DRAG BRAKE DISCS

Clean the diamond screw and slide tubes and lightly
lubricate their entire lengths.  Slide the carrier assembly
onto the slide bars and engage the pawl with the dia-
mond screw.  Lightly lubricate the sealing surfaces of
the diamond screw and the handwheel shaft.  Install the
support bracket onto the winch, being careful not to
damage the seal as it engages the diamond screw.
Install all capscrews and lockwashers and torque to their
correct values.  Apply a liberal coating of grease to the
bearing cup and cone.  Install the spacer washer, bear-
ing cup and cone, and the cover and shims.