Mittler Bros Machine & Tool 400-VSUADJ - Manual (Page 17)

- 17 -
HAND WHEEL SHAFT REPLACEMENT
1.
Remove bolts holding vise base to compound feed table – remove vise. (see page 9 steps 1 & 2)
Upper Adjustment Screw Replacement – Left-to-Right Movement:
2.
Remove upper slider block adjustment screws using 3/16” Allen wrench – located on backside of
upper slide gib assembly.
3.
Loosen (Do Not Remove) 5 gib mounting 5/16” socket head cap screws on vise mounting plate to
allow front gib clearance.
4.
Turn upper hand wheel clockwise (left-to-right movement) to remove vise mounting plate and
upper gibs from bronze gibs to expose bronze adjusting nut. Place vise mounting plate on bench.
CAUTION: Proceed with care – Do Not Drop.
5.
Remove setscrew in upper bronze nut mounting block – use 1/8” Allen wrench.
6.
Remove snap ring on each side of bronze nut.
7.
Remove bronze nut from housing and discard.
8.
Install new bronze nut (right hand thread) in upper mounting block.
9.
Install new snap ring on each side of bronze nut.
10.
Use 1/8” drill bit and drill point the bronze nut through the set screw hole in mounting block – Do
Not drill through bronze bushing.
11.
Install/Tighten set screw – use 1/8” Allen wrench.
12.
Remove Nylok nut from hand wheel – use ¾” socket.
13.
Remove hand wheel from shaft.
14.
Remove acme screw from bronze bushing and mounting block.
15.
Replace bronze bushing in mounting block – shoulder to the inside of mounting block.
16.
Install new acme screw in bronze bushing (right hand thread).
17.
Install new bronze washer over shaft on outside of mounting block.
18.
Install hand wheel and Nylok nut – Tighten until clearance between hand wheel and block is
removed – DO Not over tighten.
Lower Adjustment Screw Replacement – In-to-Out Movement:
19.
Remove lower slider block adjustment screws using 3/16” Allen wrench – located on right side of
lower slide gib assembly.
20.
Loosen (Do Not Remove) 5 gib mounting 5/16” socket head cap screws on underside of base
plate to allow left gib clearance.
21.
Turn lower hand wheel clockwise (in-to-out movement) to remove bronze gib block from lower
slide gibs to expose bronze adjusting nut. Place bronze gib block on bench.
CAUTION: Proceed
with care – Do Not Drop
22.
Remove setscrew in lower bronze nut mounting block – use 1/8” Allen wrench.