Wheel cap nuts must be kept tight (see section 4 of the Alcoa Wheel Service
Manual, July 2002). When checking the cap nuts on dual disc wheels using the
stud located ball seat mounting system, loosen every other outer cap nut and
then check the torque of the inner cap nuts. Re-torque the loosened outer cap
nuts. Repeat these steps on the remaining studs. Check all cap nuts for proper
torque after the first use or any removal. Inspect wheels and check wheel nuts
during service stops (see section 2 of the Alcoa Wheel Service Manual, July
2002). Dirt streaks from cap nuts may indicate looseness.
Flange nuts must be kept tight, and studs and nuts should be checked frequently.
At tire changes, nuts and studs should be inspected to be sure they are in good
condition. If nuts require frequent tightening or studs break frequently, hardware
and mounting practices should be reviewed.
The proper torque for ball seat cap nuts is between 350 and 400 foot-pounds for
stud threads lubricated with SAE 30W oil and between 450 and 500 foot-pounds
for threads that are not lubricated. The proper torque for M22-1.5 two-piece
flange nuts (33 mm hex head) is between 450 and 500 foot-pounds.
Keep wheel nuts
tight
Lead balance weights for Alcoa wheels are available from your Alcoa wheel
distributor. With radial tires, it may be necessary to temporarily reduce the tire
pressure to allow clearance of the weight clamp over the rim flange.
Lead balance
weights (clip-on)
Do not heat wheels in an attempt to soften them for straightening to repair damage
from striking curbs or other causes. The special alloy used in these wheels is
heat-treated, and uncontrolled heating will weaken the wheel.
Do not rework, weld, heat or braze Alcoa aluminum wheels for any reason. This
does not include normal wheel maintenance as described and approved by
Alcoa.
Do not straighten
wheels
Some fleets wish to specially identify wheels with OWNERSHIP and IN-SERVICE
DATE information. If this practice is adopted:
1.
Use “Lo-Stress” stamps or equivalent.
2.
Location of stamped areas on outside disc should be in space outward from a
line between hand hole centers and a minimum of one inch from the periphery of
any hand hole.
3.
Location of stamped identification on inside of wheel should be as close to the
factory identification stamping as possible.
Note
: Use of an impression stamp on Dura-Bright® wheels can affect the appearance
and performance of the Dura-Bright® surface treatment local to the stamp.
Owner/in-service
identification
Irregular wear on the sruface of the rim flange is caused by the chafer and side wall
area of the tire working on the surface of the rim flange. Remove the wheel from
service when rim flange wear is excessive. Excessive wear can be determined
using an Alcoa approved wear gauge and procedures. For availability, contact
Alcoa Wheel Products at 800-242-9898 or 1600 Harvard Avenue, Cleveland,
Ohio 44105. If rim flange wear becomes sharp and/or cuts the tire, contact Alcoa
Wheel Products for recommended maintenance procedures.
Rim flange wear
Alcoa drop center wheels for tubeless tires come from the factory with air valves
installed. If it becomes necessary to replace an air valve, install it using the following
torque values.
Valves
10 to 14 foot-pounds
for part numbers
7 to 11 foot-pounds
for part numbers
TR 509
TR 510
TR 511
TR 542 Series
TR 543 Series
TR 544 Series
TR 545 Series
Replacement valves may be obtained from your authorized Alcoa wheel distributor.
Always use silicone O-rings - not rubber - when reinstalling valve stems. Metal
valve stem caps are recommended over plastic.
Alcoa wheel identification
Since 1977, all Alcoa aluminum disc wheels have been identified with a stamp
that shows the wheel load rating, maximum inflation pressure, date of manufacture,
part number, wheel description and DOT marking designation (shown below).
Identification
ALCOA® FORGED
MAX LOAD 7300
MAX PSI 120
T-DOT
060602 PART NO 883620DB 22.5X8.25 15
O
DC
Wheel Load Rating
(Pounds)
Maximum
Inflation Pressure
FMVSS 120
Designation
Date of Manufacture
(Day/Month/Year)
Wheel Description
Prior to June 1996, all Alcoa heavy duty truck wheels has the Alcoa identification
symbol on the outside of the disc near the hand hole and in line with the valve
location. This marking was phased out on heavy duty truck wheels manufactured
after June 1996.
Note: Prior to June 1999, all heavy duty truck wheels manufactured by Alcoa
Wheel Products were date stamped with the month and year only.
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Страница 1083: ...Section 22 HEATING AND AIR CONDITIONING PA1564 15 FIGURE 16 REFRIGERANT CIRCUIT CENTRAL SYSTEM 22247...
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Страница 1106: ...Section 22 HEATING AND AIR CONDITIONING PA1564 38 FIGURE 39 REFRIGERANT CIRCUIT SMALL SYSTEM 22350...
Страница 1108: ...Section 22 HEATING AND AIR CONDITIONING PA1564 40 FIGURE 42 CENTRAL HEATING SYSTEM COMPONENTS 22338...
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Страница 1119: ...Section 22 HEATING AND AIR CONDITIONING PA1564 51 FIGURE 55 SMALL HEATING SYSTEM COMPONENTS 22337...
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Страница 1126: ...WORKSHOP MANUAL COMPRESSOR MODEL 05G TWIN PORT...
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Страница 1224: ...Section 26 XLII SLIDE OUT PA1564 12 FIGURE 16 KEYLESS BUSHING INSTALLATION INSTRUCTION...