Installation; Depression Mechanism System Adjustment; Adjustable Compression Tube; Figure 3-24: Compression Tube Assembly - Upright SL20 Series Service & Parts Manual

3.20 A
DJUSTABLE

Figure 3-24: Compression Tube Assembly

SL20
A
SSEMBLY
1. Lubricate and install the seal on the piston.
2. Lubricate and install the rod wiper, rod seal and static seal onto the head.
3. Carefully push the rod assembly into the cylinder.
4. Screw the head into the cylinder.
I
NSTALLATION
1. Installation is reverse of removal.
2. Cycle the cylinder several times to remove air from system.
3. Check all connections for leaks.
D M
EPRESSION ECHANISM
1. Place machine on firm level surface ± ¼°.
2. Raise the machine to access the level sensor.
3. Center level sensor bubble by turning adjustment screws on level sensor (Figure 3-8).
4. Set proximity switch to de-activate at 1.6 m (6 ft.) platform height.
5. Check that pothole protectors are fully deployed before limit switch de-activates when lifting.
6. Check depression mechanism system operation.
a. Machine should not elevate above 1.6 m (6 ft.) while on a 2° slope.
b. Machine should have low speed drive when limit switch is de-activated and machine is
level.
c. Machine should have high speed drive when limit switch is activated.
d. Tilt alarm should sound when platform is elevated above 1.6 m (6 ft.) and machine is
off level by 2°.
7. Adjust the stops so that it allows 3/4° (±1/16°) ground clearance.
C
OMPRESSION
Support the platform using an overhead hoist.
Add shims as required to level platform ± .75° (1 1/4").
4
5
1
2 3
Maintenance - 3.20 - Adjustable Compression Tube
S
YSTEM
T
UBE
1. Shim, 16 gauge
2. Shim, 18 gauge
6
3. Shim, 20 gauge
4. Adjustable Compression Tube Weldment
5. Screw, 1/2-13 x 2 1/4 UNC HEX HD CAP
6. Locknut, 1/2-13 UNC HEX
A
DJUSTMENT
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