27
8. MODEL 4000 AND 5500 DISASSEMBLY AND REASSEMBLY
8.1 DISASSEMBLY OF BLOWER
WARNING
Before performing any repair or replacement, disconnect and lock out
power.
With proper maintenance and lubrication, normal life expectancy for gears, bearings, and seals can be
achieved. However, over a period of time these parts must be repaired or replaced to maintain the effi ciency
of your blower. This section is written in a way that will allow you to completely disassemble your blower. The
inspection of certain repairable or replaceable parts is referred to at the point of disassembly where these
parts are exposed. If at any point of inspection, repair or replacement is deemed necessary, appropriate
instruction will be given to achieve these repair or replacement is deemed necessary, appropriate instruction
will be given to achieve these repairs or replacements.
Remove the oil drain plugs [18] in the bottom of the end covers [Items 5 & 10] and drain the oil. Take out
eight cap screws [16] and remove the gear cover. It may be necessary to tap the sides with a mallet or
wooden block to break the seal joint.
Gears are not exposed for visual inspection. Items in brackets [ ] are referenced to item numbers shown
in the
Parts Lists and Assembly Drawings
section beginning on page 27 for each particular blower model
and series.
• Broken
Teeth
• Chipped
Teeth
• Uneven
Wear
• Excessive
Wear
• Any
Other
Abnormalities
1. Insure that all oil is drained from unit and
remove port fi ttings [38].
2. Remove spanner lock nut [83], dust water [82],
screws [93] and seal adapter housing [91]. Tap
out seal [76] and discard O-rings [92, 140].
Remove spacers [77 & 74], and discard O-ring
[75]. New Style only 64/67 series.
3. Remove cap screws [26] from gear end cover.
4. Remove gear end cover [6] using beveled
chisel and hammer, unless jackscrew holes
have been provided.
5. Remove snap ring [47] from drive shaft.
6. Using gear pullers, remove drive shaft bearing
[50].
7. Remove drive shaft [45].
8. Remove gear Iocknuts [35] and locks [36].
9. Align timing marks, see Fig. 11 on timing gears
[8].
10. Rotate drive gear in a clockwise rotation approximately 4 or 5 teeth and mark this location, see Figure
12. This gear position is necessary so rotors will clear and not jam. Do not allow the reference marks to
change location while the driven gear is being removed.
11. Using gear pullers, pull driven gear fi rst.
12. After removal of the driven gear, continue with pulling the drive gear.
13. Remove gear end bearing retainer rings [14], exposing bearings.
14. Remove cap screws [26] and free end cover [7], exposing oil slinger assembly.
1”
2 5/8”
5 1/4”
2”
15/16”
1 7/8”
3/4”
Drill Ø 11/16”
Tap 3/4” - 16 UNF
7/16” × 1” Slot
(Thru)
Snap-On
P/N CJ66-15-3
or equivalent
Snap-On P/N CJ83-3
or equivalent
Figure 11 - Illustration of Bar Puller
See drawing on page 35 for further details.
