Disassembly
Follow the exploded schematic on the 2nd page of this
section to assist in taking apart the locking mechanism
and to assemble the system back together. Please note that
the quick - tach does not have to be removed to service or
replace locking mechanism parts.
1 Remove the bolt retaining the lock handle to the lock
linkage. (fig. C3594)
2 Remove the bolt retaining the lock handle to the
quick - tach frame. (fig. C3594)
3 Pull the locking pin and linkage out of the guide
bushing. (fig. C3595)
4 Loosen the jam nut on the linkage block. Remove the
bolt holding locking pin to the lock linkage block.
5 Separate the parts and inspect the spring for broken
or sacking (compressed) coils. (fig. C3596) Replace parts
as required.
6 Inspect the locking pin for wear. Make sure the
beveled end of the pin is not worn or broken off the oppo-
site side of the bevel. Check the fit of the pin in the quick
- tach guide bushing. If the pin or bushing is excessively
worn replace the pin or complete quick - tach assembly.
7 Inspect the lock handle mounting holes for fit against
the handle pivot bushings. Replace the handle or pivot
bushings as required if the fit is sloppy. (fig. C3596)
8 Check the fit of the lower pivot pins in the quick -
tach. Discard worn pins and replace the hardened bush-
ings in the quick - tach if so equipped.
9 Check and replace any grease fittings that are dam-
aged or defective.
6-5
C3594
C1818
C3596
C3595
Assembly
Upon assembling the locking mechanism to the quick -
tach, use 242 Loctite (blue) on all the mounting nuts and
bolts.
1 When assembling the locking pin to the spring, bush-
ing and linkage block, adjust the length of the bolt to 4
1/16 inches. (103mm). This is measured from under the
head of the bolt up to, and against the linkage block. (fig.
C1818) This is very crucial for lock pin engagement to
the attachment.
2 Replace the rest of the lock mechanism in the reverse
order above.
3 Lubricate all pins and bushings.
4 Check the lock mechanism by cycling the lock levers
to ensure correct engagement through the attachment and
sufficient pressure to hold the lock system down in the
over - center position. (Engages and stay in the locked
position)
Linkage bolt measurement
Pivot bushing Stabilizer bushing
Bolt
Spring
Jam nut
Linkage block
Q / T handle bolts
Handle
Lock pin
Lock pin
guide bushing
QUICK - TACH 6.1
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