34
MHD56114 - Edition 4
Brake Disc Assembly
(Dwg. MHP1011)
(Dwg. MHP0667)
8.
Install the three dowel pins (9) in housing (6). Apply
Loctite
®
515 sealant on mating surfaces of housing and end
cover (2). Install housing by aligning dowel pins with
separator (14) and friction plate (13) grooves and, also
aligning capscrew holes in housing with holes in end cover.
9.
Install ring (4), and diaphragm support plate (5). Support
plate radius must be next to diaphragm (3).
10. Install diaphragm (3) and end cover (2).
11. Locate as shown on Dwg. MHP0630 on page 44 and install
two capscrews (1). Evenly and alternately tighten capscrews
to compress springs. Torque capscrews to 18 ft lbs (24 Nm).
12. Install brake shaft (25) and place assembly on outboard
(opposite motor end) upright (26). Align capscrew holes
such that the breather (8) is slightly off top dead center.
Install six capscrews (1). Torque capscrews to 18 ft lbs (24
Nm). Install exhaust valve (79), elbow fitting (80) and
connect air hose (75) to elbow fitting.
13. Winch drum
may
rotate in the haul-in direction and
must
not
rotate in the payout direction, unless air is applied to the
brake, when assembled properly.
Manual Drum Band Brake Assembly
Optional feature. Refer to Dwg. MHP1402 on page 47.
1.
Press bushings (143) into brake band pivot brackets. Bushing
flanges must be to the motor upright side.
2.
Attach adapter plate (145) to upright (68) loosely with
capscrews (133) (apply Loctite
®
242 to threads) and washers
(131).
3.
Place brake band (136) onto drum and rotate around drum
(close to mounting position). Spread brake band (136) apart
slightly and slide in over drum flange. Place brake band
pivot bracket over pin in adapter plate (145).
4.
Repeat this procedure for brake band (137).
5.
Place washer (142) over pin in adapter plate (145) and
secure with cotter pin (144).
6.
Insert pivot nut (134) into brake handle (135).
7.
Place brake handle (135) into bracket in brake band (136)
and tighten screws in handle. Slide grip over brake handle.
8.
Place brake link stud (141) into pivot nut (134) and rotate
clockwise until approximately 1 in. (25 mm) of threads are
exposed.
NOTICE
• Refer to ‘ADJUSTMENT’ section for adjusting brake.
9.
Lift up brake handle (135) until hole in brake link stud (141)
and bracket in brake band (137) are aligned. Insert pin (138)
and secure with cotter pin (139).
10. Push brake handle (135) down to the lock position.
11. Tighten capscrews (133).
Automatic Drum Band Brake Assembly
Optional feature. Refer to Dwg. MHP2508 on page 46.
For ease of assembly install bracket (106) and cylinder (121)
assembly to motor end upright (68) prior to assembling upright to
drum.
1.
Assemble the brake cylinder (121) as follows:
a.
Install ‘O’ ring (122) on piston (123).
b.
Heavily coat the piston and cylinder rod with
“LubriPlate” MO-LITH No. 2 or equivalent lubricant.
Install ‘O’ rings (109) and (110) on cylinder rod (108).
Place cylinder rod (108) into piston (123) and secure in
place using retainer ring (111).
c.
Install piston assembly in brake cylinder (121).
d.
Install washer (128) and springs (124) and (127).
DANGER
•
• Springs (124) and (127) exert a considerable force on cover
(125) when assembled . Extreme care must be taken when
assembling and installing cover (125) and retainer ring (126).
e.
Using a press, slowly compress cover (125) and springs
until the retainer ring groove is accessible. Install
retainer ring (126). To ensure that retainer ring is
properly installed, tap the end of the retainer ring with a
punch until the entire retainer ring rotates in brake
cylinder groove. Slowly release press and ensure
retainer ring securely holds cover in place.
2.
If not accomplished during ‘Winch Assembly’ steps, install
bracket (106) to inside of motor end upright (68) and secure
in place using capscrews (107) and (112). Torque capscrews
to 85 ft lbs (115 Nm).
