16.
Install mast slider blocks with self-tapping
screws into the top and bottom of second inter-
mediate mast weldment. Tighten self-tapping
screws to 2.1 N•m (18.6 lbf in).
17.
Install phasing cable pulley to lower stubshaft
on second intermediate mast weldment using
two washers and snap ring. See Figure 11.
WARNING
Use a lifting device to move mast weldments to
prevent serious injury. Each mast weldment
weighs approximately 68 kg (150 lb).
18.
Using a lifting device, lift third intermediate
mast weldment and slide it through mast slider
blocks on top of second intermediate mast weld-
ment to the position shown in Figure 13. This
provides access to chain sheave stubshafts on
second intermediate mast weldment.
19.
Install two chain sheaves onto upper stubshafts
of second intermediate mast weldment using
two snap rings. See Figure 11 and Figure 12.
20.
Install washer, round belt pulley, another
washer (one washer on each side of pulley) and
snap ring onto upper stubshaft of second inter-
mediate mast weldment. See Figure 11 and
Figure 12.
21.
Install two lift chains, with a length of
1924.05 mm (75 3/4 in.), to chain anchors using
two chain anchor pins and two cotter pins.
NOTE:
During installation, chain anchor pins must
face outboard side of mast. See Figure 10.
22.
Install free end of lift chain (no chain anchor at-
tached) to chain retainer blocks at top of first
intermediate mast weldment with chain anchor
pins and cotter pins. See Figure 10.
23.
Route lift chains over chain sheaves on top of
second intermediate mast weldment.
24.
Install two mast slider blocks onto bottom of
third intermediate mast weldment using four
self-tapping screws. Tighten screws to
2.1 N•m (18.6 lbf in). See Figure 9.
NOTE:
Do not adjust setscrews at this moment.
Start the thread and do not apply pressure to slider
block.
NOTE:
Apply Loctite® Blue 242 Threadlocker to
setscrew threads prior to installation.
25.
Install four setscrews (two on each slider block)
onto slider blocks on bottom of third intermedi-
ate mast weldment.
26.
Loosen self-tapping screws and tighten set-
screws to close gap between mast slider block
and edge of channel on fourth intermediate
mast weldment. See Figure 14 for gap require-
ments.
27.
After correct gap is achieved, tighten self-tap-
ping and setscrews to 2.1 N•m (18.6 lbf in).
1. SECOND INTERMEDIATE MAST WELDMENT
2. FIRST INTERMEDIATE MAST WELDMENT
3. SLIDER BLOCK
4. CONTROL GAP*
*CONTROL GAP IS:
FRAME SLIDER BLOCKS 0.50 TO 4.0 mm (0.02 TO
0.16 in.)
MAST SLIDER BLOCKS 0.50 TO 3.0 mm (0.02 TO
0.12 in.)
Figure 14. Slider Block and Mast Weldment Gaps
4000 SRM 1916
Mast Repair
17
