Installation Instructions

M MOWER
B177FM46
B1700·B2100·B2400 WSM,11770
Outer Pulley and Blade Shaft
1. Unscrew the outer pulley mounting nut (22), and remove the
outer pulley
(25) and feather key (20).
II NOTE
• The outer pulley mounting nut has left-hand threads. Turn
it clockwise to loosen.
2. Unscrew the pulley holder mounting screws (18), and
separate the
left pulley holder (30) and plate (26) from the
mower deck.
3. Remove the external snap ring (36) on the left blade shaft
(31).
4. Remove the spline boss (35) and oil seal (34).
5. Remove the internal snap ring (33) and tap out the left blade
shaft
(31) with the ball bearings (29), (32), taking care not to
damage the grease nipple (21).
6. Remove the oi I seal (27) and internal snap ri ng (28).
7. Remove the ball bearings (29), (32) from the blade shaft (31).
8. Remove the right pulley holder (10) and blade shaft (12) as
above.
(When reassembling)
• Replace the oil seals (34), (27), (15) and (7) with new ones.
Outer pulley mounting
166.7to 186.3 N'm
17.0to 19.0 kgf'm
nut
123.0 to 137.4 ft-Ibs
Tightening torque
Pulley holder mounting
77.5
to 90.2 N'm
7.9to9.2 kgf'm
screw
57.1 to 66.5 ft-Ibs
(1) Outer pulley Mounting Nut
(2) Spring Washer
(3) Plain Washer
(4) Outer Pulley (Right)
(5) Pulley Holder Mounting Screw
(6) Plate
(7) Oil
Seal
(8) Internal Snap Ring
(9) Ball Bearing
(10) Pulley Holder (Right)
(11) Feather
Key
(12) Blade Shaft (Right)
(13) Ball Bearing
(14) Internal
Snap Ring
(15) Oil Seal
(16) Spline Boss
(17) External Snap Ring
(18) Pulley Holder Mounting Screw
M-S20
(19) Grease Nipple
(20) Feather
Key
(21) Grease Nipple
(22) Outer Pulley Mounting Nut
(23) Spring Washer
(24) Plain Washer
(25) Outer Pulley (Left)
(26) Plate
(27) Oil
Seal
(28) Internal Snap Ring
(29) Ball Bearing
(30) Pulley Holder (Left)
(31) Blade Shaft (Left)
(32)
Ball Bearing
(33) Internal
Snap Ring
(34) Oil Seal
(35) Spline Boss
(36) External Snap Ring