BRADEN PD12C Series User manual

MATERIAL LIST
AND
INSTALLATION INSTRUCTIONS
RATCHET AND PAWL
BRADEN
PACRWINCH
800 E. Dallas Street, Broken Arrow, OK 74012
PHONE [phone] FAX [phone]
www.paccarwinch.com
For Use With The Following Braden Hoists:
PD12C
PD15B
PD10-75B PD10-77B
PD15-75B PD15-77B
LIT2137 R3
July 2017
Printed in USA

1.38
99
N
86
J
M
A
3.88
G
.531
4 HOLES
9.25
8.88
B
C
L
P
K
H
FIG 1
FIG 2
FIG 3
1.31 in. (33.3 mm)
CLEVIS
ADJUSTMENT
NO PAINT ON
THIS SURFACE
D ± .06
Min. Mat’l Removal
for 80% Cleanup
.06 R
.422 (+.008, -.003) thru
1/2 -13UNC-2B
12 holes
Disclaimer: Due to the added
wrench flat feature on the pawl shaft,
1.31 inches is no longer feasible.
Tighten jam nut to contact followed
by the clevis. (End measurement will
be 1.38 inches.)

INSTALLATION INSTRUCTIONS FOR ASSEMBLY
OF RATCHET AND PAWL KITS ON BRADEN “PD”
HOISTS
1. Remove wire rope from the hoist (if applicable) and
move hoist to a clean work area for disassembly.
2. Disassemble hoist per instructions given in
PD12C/PD15B Service Manual (publication # PB-
115)
3. Machine and drill holes on the inside of the drum
flange opposite the cable wedge pocket (see Figure
2)
4. Tap drilled holes to ½-13UNC-2B (see Figure 2)
5. Align the ratchet wheel halves (item 99) with the
twelve (12) tapped holes in the cable drum making
the O.D. of the ratchet halves concentric with the
O.D. of the drum flange. The O.D. of the ratchet
halves should be almost flush with the outside of the
drum flange. A limited amount of drum flange run-
out may be possible with variances in the drum
castings
6. Attach the ratchet wheel halves to the drum flange
using twelve (12) ½” UNC x 1½” grade 8, zinc plat-
ed capscrews (104322) along with ½” standard lock
washers (11026). Torque capscrews to 80 ft. lbs.
7. Position pawl assembly (item 86) in place per
dimensions A, B & C. Slowly rotate the cable drum
so that the pawl fully engages the ratchet wheel
(see Figure 1). Adjust the clevis on the 81663 cylin-
der assembly to 1.31 in. (33.3 mm) (see Figure 3).
8. Connect all hoses.
9. Attach the pawl assembly base to the crane mount-
ing structure using four (4) ½” Grade 8, zinc plated
capscrews to prevent corrosion. The capscrew
length will depend on the mounting structure.
Torque the capscrews to the proper torque specifi-
cation.
10. Check operation of hoist and ratchet & pawl assem-
bly to insure that the pawl will always fully disen-
gage ratchet wheel (when control lever is in lower-
ing mode) and that the pawl engages fully (when
control lever is in neutral or the raise position).
TROUBLESHOOTING
THE PAWL WILL NOT ENGAGE OR NOT ENGAGE FULLY:
1. Check Figure 3 and adjust if necessary; should be
1.31 in. (33.3 mm).
2. The spring in the 81663 cylinder assembly may be
weak or broken. Disassemble the cylinder and
inspect spring. If it is not broken, check spring free
height. It should be 2.50 ± .09 in. (63.5 ± 2.3 mm).
3. Check the orifice (located in the piston) to be certain
it is clear. The orifice hole is approximately .020 in.
(.51 mm) in diameter.
THE PAWL WILL NOT DISENGAGE:
1. If the ratchet is too tight against the pawl it may not
disengage. Raise the load slightly and disengage
normally.
2. Check Figure 3 and adjust if necessary.
CYLINDER ASSEMBLY LEAKS HYDRAULIC FLUID:
1. Disassemble, remove and replace all O-rings.
ADJUSTMENT
Note: The 81663 cylinder has an internal relief
valve that is factory pre-set (1200 to 1500 psi). No
further adjustment is necessary.
Pawl Assembly
Winch A
(in.)
B
(in.)
C
(in.)
D
(in.)
E
(in.)
Part No. Part No. Qty. Part No. Qty. Part No. Qty.
PD12C-02 8.27 3.13 23.64 10.88 13.38 62386 29696 2 104322 12 11026 12
PD12C-04 8.17 4.73 24.98 11.75 15.38 62387 29700 2 104322 12 11026 12
PD12C-05 8.27 3.13 23.64 11.00 13.38 62386 29702 2 104322 12 11026 12
PD15B-04 8.16 4.73 24.98 11.75 15.38 62387 29700 2 104322 12 11026 12
PD15B-05 8.27 3.13 23.64 11.00 13.38 62386 29702 2 104322 12 11026 12
Lockwashers
Capscrews
Ratchet Half
PD10-75B 12.14 8.62 30.25 11.00 13.38 65256 29702 2 104322 12 11026 12
PD15-75B 12.14 8.62 30.25 11.00 13.38 65256 29702 2 104322 12 11026 12
PD10-77B 8.75 3.875 30.25 11.00 13.38 65256 29702 2 104322 12 11026 12
PD15-77B 8.75 3.875 30.25 11.00 13.38 65256 29702 2 104322 12 11026 12

HYDRAULIC SCHEMATIC
(FITTINGS SHOWN MAY NOT MATCH ALL HOISTS)
RATCHET AND PAWL CYLINDER
PART NUMBER 81663
NOTE:
CONNECT PORT (H) ON CYLINDER TO PORT (G) ON
MOTOR (LOWERING).
CONNECT PORT (J) ON CYLINDER TO PORT (L) ON
HOIST AND PORT (K) ON BRAKE VALVE.
CONNECT PORT (M) ON CYLINDER TO PORT (P) ON
MOTOR AND PORT (N) ON BRAKE VALVE.
NOTE:
SEAL KIT FOR CYLINDER 81663 IS PART NUMBER 61614.
LIT2137 R3
July 2017
Printed in USA