SUBSECTION 6E
SWING BRAKES AND LOCKS
1. With the brake applied (hydraulic pressure released)
1. Heat bearing (37) and install the bearing firmly against
loosen jam nuts (01) and turn adjusting nuts (02) so that the
the shoulder of shaft (34). Slide spacer (38) over shaft (34).
length of springs (03) is 4-1/4 inches.
2. Press bearing (39) into the shaft bore of the revolving
2. Loosen jam nut (04) and adjust nut (05) so that the pis-
frame, pressing on the outer cup only.
ton of cylinder (06) has one inch of stroke travel when the
3. Pack the cavity below bearrng (39) with multipurpose
brake is released (hydraulic pressure applied).
grease.
360 SWING LOCK (2100J1405)
4. Install shaft (34) from beneath the upper until spacer (38)
is pressed firmly against bearing (39).
GENERAL. The 360 swing lock is used to lock the machine
upper in any position in relation to the lower. Moving the
5. Place the brake shoe assembly over shaft (34). Install
switch to the disengaged position moves the stop block out
and fasten pins (14) in place.
of slewing ring bull gear. Moving the switch to the engaged
6. Connect lines (32) and lubricate the bearings thor-
position moves the stop block into the slewing ring bull
oughly through the grease fittings.
gear. See Figure 6E-3.
7. Install retainer (09). spacer (08) and shield (07) and
REPAIRS. The only repair item is the hydraulic cylinder. See
fasten securely with capscrews (05).
Subsection 5D for replacement of the hydraulic cylinder.
ADJUSTMENT. The swing lock must be adjusted so that
pins "A", "B" and "C" are in line when the stop block is fully
engaged in the slewing ring bull gear (see Figure 6E-3).
Adjust as needed using adjusting capscrew and jam nut.
ADJUSTMENT. To adjust the swing brake, proceed as fol-
Tighten jam nut after adjusting.
lows (see Figure 6E-1):
6E-2