7-4.2 Three Stage Mast; 7-4.2.1 Mast Lifting Chain; 7-4.2.2 Platform Lifting Chain - Big Joe Joey J1 Series Maintenance And Repair Parts Manual

7-4.2. Three Stage Mast
7-4.2.1.Mast Lifting Chain
1. With the vehicle wheels securely blocked, raise
the inner mast (49,
three feet and position blocks or strong supports
under the inner mast (49).
2. Lower inner mast onto the support. Check that
arrangement is secure before proceeding.
3. Engage the emergency power disconnect switch
(6, Figure 11-8) and turn off key switch (3).
WARNING: Before attempting any replacement,
make certain power is disconnected.
4. Remove cotter pin (3,
clevis pin (4) and anchor (6) connecting chain (5)
to inner mast (49, Figure
5. Remove cotter pin (3,
and clevis pin (4) connecting chain (5) to adjust-
ing screw (1) at the outer mast (1,
6. Remove chain from sheave (14).
7. Position new chain on sheave (14).
8. Secure chain (5, Figure
ure 7-3) with adjusting screw (1), clevis pin (4),
flat washer (8) and cotter pin (3).
9. Connect the opposite end of chain to the inner
mast (49, Figure 7-3) with anchor (6,
clevis pin (4), washer (8) and cotter pin (3).
10. Adjust the chains according to paragraph
11. Disengage the emergency power disconnect
switch (6, Figure 11-8) and turn on key switch (3).
7-4
Figure 7-3) approximately
Figure 7-1), flat washer (8),
7-3).
Figure 7-1), flat washer (8)
Figure 7-3).
7-1) to outer mast (1,
Figure 7-1),
7-2.
7-4.2.2.Platform Lifting Chain
1. With the vehicle wheels securely blocked, raise
the Platform (49,
feet and position blocks or strong supports under
Platform (49).
2. Lower Platform onto the support. Check that
arrangement is secure before proceeding.
3. Engage the emergency power disconnect switch
(6, Figure
WARNING: Before attempting any replacement,
make certain power is disconnected.
4. Remove cotter pin (3,
clevis pin (4) and anchor (6) connecting chain (5)
to lift cylinder (18,
5. Remove cotter pin (3,
and clevis pin (4) connecting chain (5) to adjust-
ing screw (1) at Platform (49,
6. Remove chain from sheave (17,
7. Position new chain on sheave (17).
8. Secure chain (5,
ure 7-3) with adjusting screw (1,
Fig-
clevis pin (4), flat washer (8) and cotter pin (3).
9. Connect the opposite end of chain to the lift cylin-
der (18, Figure
clevis pin (4), washer (8) and cotter pin (3).
10. Adjust the chains according to paragraph
11. Disengage the emergency power disconnect
switch (6,
Figure 7-3) approximately three
11-8) and turn off key switch (3).
Figure 7-1), flat washer (8),
Figure 7-3).
Figure 7-1), flat washer (8)
Figure
Figure
Figure 7-1) to Platform (49,
7-3) with anchor (6,
Figure 11-8) and turn on key switch (3).
BL-J1-0315 - 11-19-2019
7-3).
7-4).
Fig-
Figure 7-1),
Figure 7-1),
7-2.