F
OR
M
ODELS
: JGI, JGM, JGN, JGP
AND
JGQ
S
ECTION
5 - M
AINTENANCE
PAGE 5-19
through the sprocket and into the crankshaft face.
3.
The drilled hole will relieve most of the shrink, and a couple of good radial hits
with a hammer and chisel will open the sprocket enough so it can be easily
removed.
Chain Sprocket - Installation
Encircle the sprocket with wire. Suspend the sprocket from the wire and heat it with a small
propane torch. When it has attained a yellow glow, approximately 400°F (240°C), it can be
slipped over the auxiliary end of the crankshaft. Do not over heat the sprocket. Hold the
sprocket in position with high temperature gloves or two pieces of clean wood, rotating it
slightly to make sure it is square, until it has cooled enough to shrink on the crankshaft.
CAUTION!: DO NOT TOUCH HOT SURFACES WITHOUT PROPER INSULATION TO
PREVENT INJURY.
Fan Shaft Assembly Procedure
For JG:A/2/4 and JGM:N:P:Q/2 compressors with a fan shaft, install on the crankshaft:
1.
Use Loctite primer “T” and apply Loctite 620 (Green) Retaining Compound to
the stud threads, on one end only.
2.
Work quickly before Loctite begins to harden and thread the stud end with the
Loctite into the fan shaft until fully seated, hand tight, in the bottom of the hole.
Do not torque the stud in the fan shaft.
3.
Do not apply Loctite to the crankshaft end of the stud.
4.
Lubricate the crankshaft end stud threads and the fan shaft shoulder seating
surfaces with oil.
5.
Thread the stud into the crankshaft and snug up the fan shaft.
6.
Use a calibrated torque wrench with an open end 1-5/8 in. crowfoot, such
as “Snap-On” SCO52 (1/2 in. drive) or equal positioned at a right angle, on
the wrench flats to tighten the fan shaft.
If the crowfoot is not at a right angle
to the torque wrench, adjust the torque wrench reading to provide the desired
torque value on the fan shaft. Refer to the Ariel Technical Manual, Section 1, for
tightening procedures.
F
IGURE
5-15 O
PEN
E
ND
C
ROWFOOT
W
RENCH
7.
Tighten the fan shaft to the torque value in Table 1-12 on page 1-16. Loosen the
fan shaft to hand tight. Repeat the tightening torque and loosening before the
final tightening torque to Table 1-12 on page 1-16, (for a total of three tighten-
ings).
8.
Check the fan shaft runout at the keyway. Runout should be less than 0.010 in.