B-121 Mounting Kit, 15″ Load Cell, 17 - Vulcan | On

B-121 Mounting Kit, 15″ Load Cell, 17 - Vulcan | On
B-121
TECHNICAL BULLETIN
1-800-237-0022
Page 1 of 4
Stock No. H01 - 15" LOAD CELL MOUNTING KIT
Stock No. H10 - 17" LOAD CELL MOUNTING KIT, SINGLE POINT
Stock No. H11 - 19" LOAD CELL MOUNTING KIT, 5TH WHEEL
Stock No. H13 - 26" LOAD CELL MOUNTING KIT
Stock No. H25 - 26" LOAD CELL MOUNTING KIT
Stock No. H30 - 28" LOAD CELL MOUNTING KIT, EXTRA HEAVY DUTY
FIG 121-A
Stress-Tek, Inc. USA,
5920 S. 194th Street, Kent, WA 98032
253-872-1910 FAX: 253-872-9626
Rev. G
Stress-Tek, Inc. Canada, 11-1642 Langan Avenue, Pt. Coquitlam, BC V3C 1K5 604-944-1481 FAX: 604-944-1482
© STRESS-TEK, INC. 2006
B-121
TECHNICAL BULLETIN
1-800-237-0022
Page 2 of 4
Stock Numbers
Item
Description
Part No.
H01
H10
H11
H13
H25
H30
1
1-1/8" X 3-1/4" Cap Screw
30-14023-304
2
2
-
2
2
-
1
1-1/8" X 2-1/2" Cap Screw
30-14023-208
-
-
2
-
-
-
1
1-1/4" X 3-3/4" Cap Screw
30-90020-001
-
-
-
-
-
2
2
1-1/8" Hardened Washer
30-70001-026
2
-
2
2
2
-
2
1-1/4" Hardened Washer
30-70001-028
-
-
-
-
-
2
2
Custom Washer
52-30220-001
-
2
-
-
-
-
3
Bearing Pad
52-20123-001
2
2
2
2
2
-
3
Bearing Pad, Extra HD
52-20123-002
-
-
-
-
-
2
4
1" X 1-3/4" Cap Screw
30-14021-112
2
-
-
3
-
-
4
1" X 2" Cap Screw
30-14221-200
-
-
-
-
3
-
5
1" Hardened Washer
30-70001-024
2
-
-
3
3
-
Note: The three 1-1/8" Pressure Bar cap screws are not supplied by Stress-Tek, Inc. for the
H30 mounting kit as a result of varying bridge beam thicknesses.
1. MOUNTING FASTENERS: It is the installer’s responsibility to ensure all 1-14 UNS
fasteners (item 4) have 7/8" to 1" thread engagement into the load cell. If the thread
engagement is over 1", provide hardened washer(s) under the cap screw head. If the
thread engagement is less than 7/8", obtain the proper length 1-14UNS Grade 8, hex cap
screw to meet the requirement.
2. For installing load cells, check for proper fit between the load cell and the bearing pad(s). If
load cell mounting brackets or bearing pads require welding, remove load cell from bracket
before welding. Do not exceed 140 degrees Fahrenheit (60 C) on the load cell. Arcing
on the body of the load cell may seriously damage the load cell’s structural integrity
and must NOT be installed if this occurs. This also voids manufacturer’s warranty.
Note: All welding and welding procedures must meet the American Welding Society
specifications.
Stress-Tek, Inc. USA,
5920 S. 194th Street, Kent, WA 98032
253-872-1910 FAX: 253-872-9626
Rev. G
Stress-Tek, Inc. Canada, 11-1642 Langan Avenue, Pt. Coquitlam, BC V3C 1K5 604-944-1481 FAX: 604-944-1482
© STRESS-TEK, INC. 2006
B-121
TECHNICAL BULLETIN
1-800-237-0022
Page 3 of 4
3. When assembling load cell to mounting bracket and bearing pad(s), use “Never-Seize” or
equivalent thread lubricant on all mounting cap screws. DO NOT use the “Never Seize”
on the load cell connectors. Torque all the cap screws to torque specifications listed on
the next page.
Mounting Kit
1" Cap Screw
1-1/8" Cap Screw
1-1/4" Cap Screw
H01
15" Mounting Kit with
Bearing Pad.
650-890 lb-ft
1000-1400 lb-ft
Not Applicable
H10
17" Mounting Kit with
Bearing Pad.
Not Applicable
1000-1400 lb-ft
Not Applicable
H11
19" Mounting Kit with
Bearing Pad.
Not Applicable
1000-1400 lb-ft
Not Applicable
H13
26" Mounting Kit with
Bearing Pad.
650-890 lb-ft
1000-1400 lb-ft
Not Applicable
H25
26" Mounting Kit with
Bearing Pad.
650-890 lb-ft
1000-1400 lb-ft
Not Applicable
H30
28" Mounting Kit with
Bearing Pad.
Not Applicable
1000-1400 lb-ft
1450-1780 lb-ft
Note: Stress-Tek has written detailed installation manuals for certain vehicle body types
and can be consulted on installation practices.
Pre-loads may be induced in the load cell when torquing down the cap screws. Pre-loads
can be monitored on the meter by making all the electrical connections, setting the meter
calibration number to 2050 and setting the meter display to read zero by adjusting the Tare
Weight on the appropriate channel before torquing the cap screws. The allowable pre-load
after all the cap screws are torqued is ± 800 lb per load cell. If more than 800 lb of preload
is seen, the mounting surfaces are not flat and parallel. Check surfaces for warpage, and
shim or straighten as necessary. If you still have problems reducing preload, consult
Stress-Tek factory.
Stress-Tek, Inc. USA,
5920 S. 194th Street, Kent, WA 98032
253-872-1910 FAX: 253-872-9626
Rev. G
Stress-Tek, Inc. Canada, 11-1642 Langan Avenue, Pt. Coquitlam, BC V3C 1K5 604-944-1481 FAX: 604-944-1482
© STRESS-TEK, INC. 2006
B-121
TECHNICAL BULLETIN
1-800-237-0022
Page 4 of 4
4. Load cells are designed to measure vertical forces. If the load cell is mounted in a manner
that results in torsional forces in the load cell, its accuracy and life can be reduced. To
prevent this, it is important that upper and lower mounting surfaces remain flat and parallel
under load. This means that both upper and lower mounting surfaces must be stiff enough
not to rotate when loaded, properly gusseted and supported upper and lower mounting
brackets will eliminate the chance of a load cell failure under torsional (twisting) forces.
5. Additional electronic installation notes and system operational procedures can be found in
your “Vulcan Operations and Maintenance Manual” for V200 and V400 systems and the
“Owner’s Manual” for the V500 and V600 systems.
Stress-Tek, Inc. USA,
5920 S. 194th Street, Kent, WA 98032
253-872-1910 FAX: 253-872-9626
Rev. G
Stress-Tek, Inc. Canada, 11-1642 Langan Avenue, Pt. Coquitlam, BC V3C 1K5 604-944-1481 FAX: 604-944-1482
© STRESS-TEK, INC. 2006
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