Taylor TX180S - Section 18: Chassis; Introduction to the Chassis; Structural Inspection, Reporting, and Repair Procedure

TX / TXH / TXB 180S - 400L (Rev. 4/23/07)TX / TXH / TXB 180S - 400L (Rev. 4/23/07)
17-617-6
33
11
22
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NOTE:NOTE: TO TO OPERATOROPERATOR
Wheel and mounts require run in period on a new machine and after each tire change.Wheel and mounts require run in period on a new machine and after each tire change.
Refer to serial plate on the side of machine for torque specifications before machine is put in serviceRefer to serial plate on the side of machine for torque specifications before machine is put in service
and re-torque and re-torque nuts each 10 nuts each 10 hours until clamps hours until clamps are seated.are seated.
Care should be taken to keep grease and other foreign material from rim seating surfaces.Care should be taken to keep grease and other foreign material from rim seating surfaces.
Illustration Illustration 17-5. 17-5. Wheel MWheel Mounting Hardwounting Hardwareare
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Section 18
Section 18
ChassisChassis
IntroductionIntroduction(Illustration 18-1)(Illustration 18-1).. The chassis isThe chassis is
carefully engineered and ruggedly constructed,carefully engineered and ruggedly constructed,
although welded steel structures always containalthough welded steel structures always contain
undetectable cracks, especially welded joints.undetectable cracks, especially welded joints.
When these joints are subject to fluctuatingWhen these joints are subject to fluctuating
stresses of significant magnitude, these cracks willstresses of significant magnitude, these cracks will
grow. grow. This is This is known known as fatas fatigue crack igue crack growth. growth. NoNo
matter how low the stress levels are kept, somematter how low the stress levels are kept, some
fatigue crack growth will occur in all welded struc-fatigue crack growth will occur in all welded struc-
tures.tures.
Structural Inspection, Reporting, and RepairStructural Inspection, Reporting, and Repair
ProcedureProcedure(Refer to(Refer to SIRRSIRRin thein the AppendicesAppendices))..
Follow the OSHA rules, 29 CFR, 1910.178 (Q)(1),Follow the OSHA rules, 29 CFR, 1910.178 (Q)(1),
(5), & (7) which require inspecting industrial trucks(5), & (7) which require inspecting industrial trucks
daily before being placed in service, removingdaily before being placed in service, removing
trucks from service if cracks are found, and mak-trucks from service if cracks are found, and mak-
ing repairs only if authorized by the manufacturer.ing repairs only if authorized by the manufacturer.
If trucks are used on a round-the-clock basis, theyIf trucks are used on a round-the-clock basis, they
shall be examined shall be examined after each safter each shift. hift. OSHA 29 CFROSHA 29 CFR
1910.178 (p)(1) requires that trucks in need of1910.178 (p)(1) requires that trucks in need of
repair be taken repair be taken out of servout of service. ice. Areas to beAreas to be
inspected on the truck chassis include mastinspected on the truck chassis include mast
hangers, drive axle mounts,hangers, drive axle mounts,tilt cylinder anchorstilt cylinder anchors
and steer axle mounts.and steer axle mounts.
 Periodic inspection isPeriodic inspection is
required to detect fatigue cracks that haverequired to detect fatigue cracks that have
grown to a significant size in order to avoidgrown to a significant size in order to avoid
serious failure of the structural weldment.serious failure of the structural weldment.
When a crack is found, the truck must beWhen a crack is found, the truck must be
immediately taken out of service and repaired.immediately taken out of service and repaired.
 Under no circumstances,Under no circumstances,
without prior written approval without prior written approval from Taylorfrom Taylor
Machine Works, Inc. Engineering Department,Machine Works, Inc. Engineering Department,
should the chassis be modified, i.e. adding ofshould the chassis be modified, i.e. adding of
additional additional counterweights. counterweights. As per As per OSHA 29OSHA 29
CFR1910.178 (a) (4).CFR1910.178 (a) (4).
 If the fatigue crack is allowedIf the fatigue crack is allowed
to grow, catastrophic failure could occur in to grow, catastrophic failure could occur in thethe
chassis or other welded components, causingchassis or other welded components, causing
serious injury to personnel and serious injury to personnel and / or property./ or property.
Chassis TroubleshootingChassis Troubleshooting
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