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Model G0757Z (Mfd. Since 02/15)
-53-
3. Loosen tension thumbwheel and hex nut
behind lower idler pulley bracket.
Note: In next step, you may have to bump
lower idler pulley with dead blow hammer to
get it to move.
4. Apply pressure on lower idler pulley to the left
as you tighten tension thumbwheel.
Note: There is proper V-belt tension when
approximately
1
⁄4" –
1
⁄2" deflection is achieved
(see Figure 74) by applying moderate pres-
sure midway between pulleys.
Pulley
1
⁄
4
"–
1
⁄
2
"
Deflection
Pulley
Figure 74. Checking V-belt tension.
5. Retighten hex nut behind center pul-
ley bracket.
6. Close and rear column cover.
Tensioning Upper Horizontal Spindle
V-Belts
Tools Needed Qty
Hex Wrench 6mm .............................................. 1
Open-End Wrench 14mm .................................. 1
To tension upper horizontal spindle V-belts:
1. DISCONNECT MACHINE FROM POWER!
2. Open horizontal column rear cover to gain
access to horizontal spindle V-belts and pul-
leys.
3. Loosen hex nut on center cap screw shown in
Figure 75, then rotate cap screw clockwise to
increase tension in upper V-belts.
Note: There is proper V-belt tension when
approximately
1
⁄4" –
1
⁄2" deflection is achieved
(see Figure 74 on previous page) by applying
moderate pressure midway between pulleys.
4. Retighten hex nut and secure column rear
cover.
Figure 75. Upper horizontal V-belt tensioning
cap screw.
Upper V-Belts
Center
Cap Screw
& Hex Nut