Door Adjustment; Door Jam Bolt Adjustment - Komatsu 930E-2 Shop Manual

Door Adjustment

If adjustment is necessary to insure tight closure of
door, loosen striker bolt in the door jam, adjust, and
retighten.
A rubber sealer strip is mounted with adhesive around
the perimeter of the door assembly to exclude dirt and
drafts. This sealer strip should be kept in good condi-
tion and replaced if it becomes torn or otherwise
damaged.

Door Jam Bolt Adjustment

Over a period of time, the door latch mechanism and
door seals may wear and allow dirt and moisture to
enter the cab. To insure proper sealing of the door
seals, the door jam bolt may need to be adjusted
periodically.
FIGURE 2-3. DOOR JAM BOLT ADJUSTMENT
1. Washer
2. Striker Bolt
Step A. If the door closes, but not tightly enough to give
a good seal between the seal on the door and the cab
skin:
1. Mark the washer location (1, Figure 2-3) portion
of the door jam bolt with a marker, pen, or pencil
by circumscribing the outside edge of the washer
onto the jam.
2. Loosen the door jam bolt (2) and move straight
inwards 1/16" and retighten.
N02015 4/00
3. Frame
4. Seal
Truck Cab
3. Hold a piece of paper such as a dollar bill between
where the door seal (4) will hit the skin of the cab
and firmly close the door ensuring that it latches
on the second catch. (The door latch mechanism
has a double catch mechanism.)
4. The door seal should firmly grip the paper all along
the top, front, and bottom edge of the door. If the
paper is loose all around, REPEAT STEP 2. If the
paper is firmly gripped, but can be removed with-
out tearing it, open door and tighten the jam bolt
completely without affecting the adjustment.
5. If the paper slips out from the door seal easily
along the top and not at the bottom, the door itself
will have to be "adjusted". Or if the paper slips out
easier at the bottom than at the top, the door will
have to be "adjusted".
• If seals are tight at bottom of door, but not at top,
place a 4 x 4 block of wood at the bottom edge of
the door, below the handle. Close the door on the
wood block and press firmly inward on the top
corner of the door. Press in one or two times, then
remove the wood block and check seal tension
again using the paper method. Seal compression
should be equal all the way around the door. If seal
is still loose at the top, repeat procedure again until
seal compression is the same all the way around.
• If seal compression is greater at the top than at
the bottom of the door, place a 4 x 4 block of wood
at the top corner of the cab door. Then press firmly
inward on the lower corner of the door. Press in
one or two times, then remove the wood block and
check seal compression again. Seal compression
should be equal all the way around the door. If seal
is still loose at the bottom, repeat procedure again
until seal compression is uniform all the way
around.
N2-5