MAINTENANCE
EN
AH-13-01-R8 (09/2022)
32 / 55
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CAUTION
!
5. Wash all parts in solvent and inspect all components
for damage and wear. Examine the needle carefully and
replace if worn, pitting, bent, or broken. Replace any
questionable parts.
6. Install snap ring onto needle. Slide eyelet, large diameter
first, onto threaded end of needle. Install spring over
threaded end of needle and down over small diameter
of eyelet.
7. Insert needle, with previously installed components, into
spring housing (tapered end first). Push needle into the
spring housing until snap ring bottoms out.
8. Install spring retainer, small threaded diameter first, onto
needle. Holding the spring housing in one hand, compress
spring until spring retainer contacts the spring housing.
While compressing the spring, screw spring retainer into
the spring housing. Screw the spring retainer into the
spring housing until it bottoms.
9. To install the needle assembly, refer to steps 3
through 6 of “Needle Assembly Replacement” in the
“Maintenance” section.
Needle Packing Replacement
1. Complete steps 1 and 2 under “Needle Assembly
Replacement” in the “Maintenance” section.
2. Mount an 8 mm (5/16-inch) drill bit vertically in a vise.
3. Place the handle opening over the drill bit tip and insert
until the bit tip contacts packing.
4. Rotate the handle assembly until the drill bit bites into
the packing. Lift the handle assembly (to withdraw the
packing). Make sure all bits of old packing are removed.
Wash housing with solvent.
Scoring or chewing of the metal packing seat
in handle may cause permanent damage, requiring
handle replacement.
Figure 21: Needle Packing Assembly
5. Place the new packing (Item 52) on the needle assembly
(see Figure 21).
6. To install the needle assembly, with needle packing,
refer to steps 4 through 6 under “Needle Assembly
Replacement” in the “Maintenance” section.
Item #
Description
1
2
3
Handle Assembly
Needle Assembly
Needle Packing
NEEDLE PACKING ASSEMBLY
(Figure 21)
2
3
1