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THIEMAN Tailgates M16 Owner's Manual & Parts List

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W Y
Tailgates By THIEMAN
M16, 20 MLB16, 20
OWNERS M NU L/P RTS LIST
M-20 shown
IMPORT NT! KEEP IN VEHICLE!
!
PlEasE REad and undERstand thE ContEnts oF this
Manual bEFoRE oPERating thE EquiPMEnt.
TAILGATES, INC.
600 East wayne street
Celina, ohio 45822
Phone: 419-586-7727 Fax: 419-586-9724
www.thiemantailgates.com
TM
T H E A S S O C I A T I O N F O R T H E W O R K T R U C K I N D U S T R Y
M E M B E R

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  • Page 1 Tailgates By THIEMAN M16, 20 MLB16, 20 OWNERS M NU L/P RTS LIST M-20 shown IMPORT NT! KEEP IN VEHICLE! PlEasE REad and undERstand thE ContEnts oF this Manual bEFoRE oPERating thE EquiPMEnt. TAILGATES, INC. 600 East wayne street Celina, ohio 45822 Phone: 419-586-7727 Fax: 419-586-9724...

  • Page 2: Table Of Contents

    ... etc). DO NOT use the lift if these are evident. Only an authorized Thieman distributor is qualified to do repairs on the liftgate. DO NOT attempt to do your own repairs or modify this liftgate. Altering this product will void all warranties and may damage the liftgate or even cause serious injury.

  • Page 3: Parts Ordering Procedure

    ThE FOLLOWING INFORMATION MUST BE INCLUDED: 1. Serial Number – Thieman liftgate serial numbers can be found on the tag located on the front side of the trunnion tube. 2. Model Number and Capacity.
  • Page 4 waRning: Position loads PRoPERlY on PlatFoRM nEVER off-center the load on the platform, from side to side or away from truck as this may overload the liftgate. the center of weight of the load should nEVER be placed beyond the center of the platform load surface, away from truck. loads should be placed close to the platform edge nearest truck.

  • Page 5: Operating Instructions

    oPERating instRuCtions Caution Be sure to operate liftgate at a safe distance and never improperly load platform as this may cause personal injury or damage to the liftgate. unFolding oF PlatFoRM 1. Raise platform by pushing up switch until stow pin on platform is off the spacer latch. 2.

  • Page 6: Semi-Annual Inspection

    11. Check the oil level in the pump reservoir. With the liftgate in the lowered position and the platform at ground level the oil should be within 1/2” from the top of the reservoir. See chart on next page for oil applications. 12.

  • Page 7: Electrical Pictorials

    ElECtRiCal PiCtoRial...

  • Page 8: Inspection And Location Of Decals

    Danger Decal-no riding 4609 Operating Decal 4650890 Capacity Decal-1600# 4650750 Capacity Decal-2000# 4650100 Warning Decal-pinch point 4604 handle decal 4605 Thieman Nameplate 4650800 Urgent Warning Decal 4681 Reflector (3) 5705 Wiring Decal-Gravity Down 4612 Wiring Decal-Power Down 4614 Warning Decal 4620...
  • Page 9 PlatFoRM assEMblY (stEEl Main/Ext.) - M32+5, 36+6, 42+6 Item Part Number Description Qty. 3421-001 Platform Asm 7232 3421-002 Platform Asm 8432 3423-001 Platform Asm 7236 3423-002 Platform Asm 8436 3475-001 Platform Asm 7242 3475-002 Platform Asm 8442 31222-001 Main Section Weld 7232 31222-002 Main Section Weld 8432 31224-001...
  • Page 10 PlatFoRM assEMblY - 38w, 42w (stEEl Main/Ext.) Item Part Number Description Qty. 3473-001 Platform Asm 7238W 3473-002 Platform Asm 8438W 3422-001 Platform Asm 7242W 3422-002 Platform Asm 8442W 31222-001 Main Section Weld 7238W 31222-002 Main Section Weld 8438W 31224-001 Main Section Weld 7242W 31224-002 Main Section Weld 8442W 31155-001...
  • Page 11 PlatFoRM assEMblY - 42+10 REt. (stEEl Main/Ext.) Item Part Number Description Qty. 3464-001 Platform Asm 7242+10 RET 3464-002 Platform Asm 8442+10 RET 31224-001 Main Section Weld 7242+10 RET 31224-002 Main Section Weld 8442+10 RET 31654-001 Extension Weld 7242+10 RET 31654-002 Extension Weld 8442+10 RET 31655-001 Ramp Asm 7242+10 RET...
  • Page 12 PlatFoRM assEMblY - 27+6, 36+6, 40+6 (aluM. Main/Ext.) Item Part Number Description Qty. 3474-001 Platform Asm 7227+6 3474-002 Platform Asm 8427+6 3439-001 Platform Asm 7436+6 3439-002 Platform Asm 8436+6 31743-001 Platform Asm 7240+6 31743-002 Platform Asm 8440+6 31826-001 Main Section Weld 7227+6 31826-002 Main Section Weld 8427+6 31345-001...

  • Page 13: Platform Asm

    PlatFoRM assEMblY - 37w (aluM. Main/Ext.) Item Part Number Description Qty. 3472-001 Platform Asm 7237W 3472-002 Platform Asm 8437W 31826-001 Main Section Weld 7237W 31826-002 Main Section Weld 8437W 31828-001 Extension Weld 7237W 31828-002 Extension Weld 8437W 3023-001 Support Tube 5101260 Spring 5050...

  • Page 14: Spacer Asm

    sPaCER assEMblY Item Part Number Description Qty. 3500-001 Spacer Asm - 96" 3500-002 Spacer Asm - 102" 2404-002 Control Shaft - 96" Spacer Asm 2404-003 Control Shaft - 102" Spacer Asm 31592 Latch 5101100 Spring 5701043 handle 23168-005 Flat Bar...

  • Page 15: Trunnion, Lift Arm, And Idler Arm Asm

    tRunnion, liFt aRM, and idlER aRMs - M16/20 Item Part Number Description Qty. 31422-001 Trunnion Weld-M 31422-002 Trunnion Weld-MLB 31422-003 Trunnion Weld-Pintle Bracket 21026 Mounting Plate 31234 Idler Arm 31424 Lift Arm-M16/20 31429 Lift Arm-M20 Pintle Bracket 31232 Pivot Bar Weld-Standard M 31233 Pivot Bar Weld-Wedge &...

  • Page 16: Pump Asm Electric Control Power Down

    PuMP assEMblY-PowER down - M16/20 Item Part Number Description 4404 Pump Asm-Items 2 to 6 4421420 Pump Bracket 4421350 Mounting Bracket 4423520 Motor 8111 4468 Solenoid Start Switch 4420410 Breather Cap 5704 Cover 5700100 Strap 4930-001 MF-MAORB 90° 4948-001 Flow Control - 1.5 GPM 4936-001 MAORB-MAORB 90°...

  • Page 17: Pump Asm Electric Control Gravity Down

    PuMP assEMblY-gRaVitY down - M16/20 Item Part Number Description 4400351 Pump Asm-Items 2 to 6 4421420 Pump Bracket 4421350 Mounting Bracket 4423520 Motor 8111 4468 Solenoid Start Switch 4420410 Breather Cap 5704 Cover 5700100 Strap 4930-001 MJ-MAORB 90° 4951-012 hose 38" 4948-001 Flow Control 1.5 GPM 4936-001...

  • Page 18: Pump Parts

    4404 PuMP PaRts Item Part Number Description Qty. 4423520 Motor 8111 4439 Pump and Reservoir Only 4420410 Breather Cap 4480 Buss Bar 4421520 Bearing 4421530 Seal 8109-012 Screw .25 x .75 4421420 Bracket 4468 Solenoid 4421600 O-Ring 4452 Solenoid Coil Only 4445 Solenoid Valve Asm (lower) 4438...
  • Page 19 4400351 PuMP PaRts Item Part Number Description Qty. 4423520 Motor 8111 4400359 Pump and Reservoir Only 4420410 Breather Cap 4403 Reservoir Ø6 x 9 4421520 Bearing 4421530 Seal 4421350 Bracket 4421420 Bracket 4480 Buss Bar 4468 Solenoid 4421600 O-Ring 8109-009 Screw .25 x 1.38 4445 Valve Asm...

  • Page 20: Snubber Kit

    snubbER kit 172 Item Description Part Number Qty. Snubber kit Items 1 to 6 3735330 Snubber 5702290 Mounting Angle 2019033 Locknut .31-18 9413447 Flat Washer .31 8120386 Base Plate 23049-001 Screw .31-18 8180091...

  • Page 21: Troubleshooting Guide

    Note: Please refer to the electrical diagrams and hose connection drawings in the liftgate’s owners manual when troubleshooting. This guide is only for standard Thieman liftgates. Special liftgates with options other than those in the owner’s manual will require special diagrams for troubleshooting.
  • Page 22 g. With the switch activated in the “RAISE” position and the motor start solenoid is activated, check for voltage at the motor terminal. If voltage is present and the motor is not running, replace the motor. 2. Problem – Liftgate will not raise to bed with a load and the pump motor running Causes –...
  • Page 23 f. With the liftgate at the ground, disconnect the power unit and remove the reservoir. Check to see if the suction tube is clogged or has fallen out of the pump base. Clean the screen or reattach the suction tube as required. g.
  • Page 24 Clean as needed and reassemble. If this does not correct the problem replace the flow control. If you have any questions or problems that are not covered in this guide please call Thieman’s Engineering Department at 1-800-524-5210. Rev. 2/21 • 5C • MP105453...

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Tailgates m20Tailgates mlb16Tailgates mlb20

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