Komatsu 830E Shop Manual page 667

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 mecha-
nism.)
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 without tearing it, open door and
tighten the jamb bolt completely without affect-
ing 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.
Step B. If the door bucks back when trying to close it,
the striker bolt (2, Figure 2-4) has probably loosened
and slipped down from where the catch can engage
with the bolt.
1. Open the door and close both claws (3 & 5, Fig-
ure 2-4) on the catch until they are both fully
closed.
2. Transfer the center of this opening onto the skin
of the cab nearest where the door jamb bolt is
located. Use a T-square or other measuring
equipment and mark on the cab with a pencil.
NOTE: Release the door catch before trying to
close the door.
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FIGURE 2-4. DOOR JAMB BOLT ADJUSTMENT
1. Washer
2. Striker Bolt
3. Loosen and vertically align (center) the door
jamb bolt with this mark and tighten it firmly
enough to hold it in place but still allow some
slippage.
4. Carefully try to close the door (4) and determine
if this has helped the "bucking" problem. If the
door latches but not firmly enough, follow proce-
dures listed previously in "Step A". If the door
latch does not catch, move the bolt outwards
and try again. When corrected, follow adjust-
ment procedures listed in "Step A" to ensure a
good seal. By design, if both seals are in good
condition, proper adjustment of the outside seal
will ensure good contact on the inside seal to
prevent dust and moisture from entering the
cab.
Truck Cab
3. Frame
4. Seal
N2-5