Motor And Brake Assembly - JLG 400S Service And Maintenance Manual

SECTION 3 - CHASSIS & TURNTABLE

Motor and Brake Assembly

1. Starting with a Stator (8K), alternately stack and install
Stators (8K) into Lobes of Brake Housing (6) and Rotors
(8J) (internal splines) onto splines of Sun Gear (8).
NOTE: There should always be a Stator on the top and bottom of
the stack.
2. Insert Brake Piston (8A) completely into Brake Housing
(6) without O-rings (8D, 8F) and Backup Rings (8E, 8H) to
check fit of brake. The Brake Piston (8A) should slide into
Brake Housing (6) without being forced. If Brake Piston
(8A) does not fit, check for burrs or size problems before
proceeding.
3-54
Figure 3-46. Brake Port Alignment
3. Grease O-rings (8D, 8F) and install smaller diameter O-
4. Insert smaller diameter Solid Backup Ring (8H) into
5. Insert larger diameter Solid Backup Ring (8E) into groove
Ring (8F) into smaller diameter O-Ring groove in Brake
Housing (6) and install larger diameter O-Ring (8D) into
larger diameter O-Ring groove in Brake Housing (6).
smaller groove in Brake Housing (6) between O-Ring
(8F) and side of groove towards Output Shaft (1A).
in Brake Housing (6) between O-Ring (8D) and side of
groove towards Motor (31).
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