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T-16-UT (4+16)

Maintenance

Corrosive Environment Warning

CORROSIVE ENVIRONMENTS!

Saltwater, granular fertilizers and other corrosive materials are destruc-

tive to metal. To prolong the life of a braking system used under corrosive
conditions the actuator should be flushed after use with a high pressure
water hose. Failure to properly clean the actuator could weaken it and/or
cause it to fail and result in serious injury and/or property damage.

Hydraulic Lines

Occassionally check the condition and security of the lines and hoses that comprise

the brake hydraulic system. Check that the lock tabs and clamps are in place and
securely holding the lines to the frame. Look for signs of leakage, especially if you have
had to add fluid to the reservoir frequently.

Check the tubing for kinks, cracks, blockage and corrosion, and replace any that

are questionable. Inspect the hoses for age checking (cracking of the outer rubber
sheath), damage, blisters, or other signs of impending failure and replace as neces-
sary.

Hydraulic Brakes

The hydraulic brake system incorporates a free backing solenoid which allows a surge

actuator equipped trailer to move easily in reverse. Without this feature the surge actuator
would be applying the trailer brakes as the tow vehicle is attempting to back the trailer. See
page 60 for proper wiring of electrical plug for use with free backing solenoid.

WARNING

!

Summary of Contents for T-16-UT (4+16)

Page 1: ...ce 13 2 1 Structural Components 14 Sub Frame 14 Deck 14 2 2 Sub Assembly Components 14 Coupling 14 Jack 15 Cushion Cylinder 15 Deck Latch 15 Deck Hinge Assembly 15 2 3 Running Gear 16 Suspension 16 Hu...

Page 2: ...ring Voltage 35 Measuring Amperage 37 Electric Brake System Troubleshooting Chart 38 2 9 Pre Storage Maintenance 40 2 10 Pre Season Maintenance 41 Section 3 Parts 42 3 1 Structural Components 42 3 2 M...

Page 3: ...river awareness and skill can help compensate for these factors This knowledge will assist you to safely enjoy the maximum utility and productivity from your trailer First and foremost DO NOT operate...

Page 4: ...nded to carry the full rated capacity of the trailer Extreme concentrated appli cations may require additional support for the load 1 4 Vehicle Load and Handling Limits Vehicle handling limits can be...

Page 5: ...ificantly to the handling characteristics of the combination and allow the driver to utilize all the design responses of the vehicle to make evasive maneuvers in the safest manner Irregular terrain st...

Page 6: ...amiliar the driver is with the vehicle and the road the less likely he will need to make abrupt emergency maneuvers which will take the vehicle to its limits Control and stability may be main tained i...

Page 7: ...s that a safety defect exists in a group of vehicles it may pursue a remedy campaign and recall those vehicles However NHTSAcannot become involved in individual problems between you your dealer or Gem...

Page 8: ...ath DANGER DANGER indicates an imminently hazardous situation which if not avoided will result in death or serious injury WARNING WARNING indicates a potentially hazardous situation which if not avoid...

Page 9: ...djusting the trailer hitch to compensate for settling of tow vehicle springs when loaded Always visually inspect hitch for unusual appearances such as bent components cracks in welds or chipped paint...

Page 10: ...their attachment to both the trailer and the towing ve hicle Connect safety chains to tow vehicle using crossed pattern under tongue Allow slack for turning but avoid having chains drag on pavement M...

Page 11: ...aking capacity or other unstable trailer characteristics which could result in an accident causing property damage bodily injury or death It is the operators responsibility to take whatever steps nece...

Page 12: ...loading or unload ing it is very important that ramps are adjusted to proper spacing for equipment being transported When loading equipment onto deck drive slowly forward until appropriate tongue loa...

Page 13: ...onthly Check for loose or missing suspension fasteners Check brake adjustment see page 25 Quarterly Lube Dico surge actuator rollers see Surge Actuator Maintenance on page 27 Annually Pack wheel beari...

Page 14: ...either rubber compound or wood For wood decks it may be necessary to apply a new coat of wood preservative after decking has aged and become dry The best time to apply preservative is during warm wea...

Page 15: ...and or sluggish Fully collapse the cylinder and then remove the filler plug and drain out the old fluid Add 10W hydraulic fluid until the cylinder is full and all the air has been expelled Deck Latch...

Page 16: ...excess wear elongation of bolt holes and loosening of fasteners Whenever loose or replaced the fasteners in your suspension system should be torqued as detailed below 1 U bolt 45 to 60 lbs ft 2 Shoul...

Page 17: ...sed air or a lint free cloth and inspect each roller completely Also clean and inspect the cups races inside the hub Any pitting spalling bluing heat damage or corrosion is cause for replacement NOTE...

Page 18: ...ar oil ofAPI GL 5 performance level SAE 90 weight oil is normally preferred for most operating environments Other approved oil weights are SAE 80W 90 SAE 80W 85W 90 and SAE 75W 90 Seal Inspection and...

Page 19: ...spindle nut back on the spindle in the reverse order of removal Rotate the hub assembly in both directions while tightening the adjusting nut to approximately 100 lbs ft of torque 2 Loosen nut to rem...

Page 20: ...This refers to the relationship of the center line of the tire to the hub face of the axle Care should be taken to match a replacement wheel with the same offset wheel as originally equipped Failure t...

Page 21: ...hreads must be clean dry and in good condition for applying installation torque Tighten the lug nuts in the following pattern in three steps first to 20 25 lbs ft next to 50 60 lbs ft and then to the...

Page 22: ...Rubber Manufacturers Association or the tire manufacturer Inflation Pressure Correct inflation pressure for the 215 75R 17 5 tire is 125 psi and is the most important factor in tire life Inflation pr...

Page 23: ...particular load per tire catalog Side Wear Loss of camber or over loading Adhere to load limits Have axle aligned Toe Wear Incorrect toe in Have axle aligned Cupping Loose bearing or out of balance A...

Page 24: ...mp or volt meter to verify that the electrical system is functioning properly If it is then replace the lamp if not then troubleshoot the electrical system Junction Block The junction block requires n...

Page 25: ...ground especially if you are going to be working under the trailer Brake Adjustment Brakes should be adjusted 1 after the first 200 miles of operation when the brake shoes and drums have seated 2 at 3...

Page 26: ...lining is worn to 1 16 thickness or less contaminated with grease or brake fluid or abnormally scored or gouged Hardware Check all hardware Check shoe return spring hold down springs and adjuster spr...

Page 27: ...ers which then causes the trailer brakes to be applied Surge Actuator Maintenance Before towing check that the brake fluid reservoir is full If not refill to 3 8 inch below the top of the reservoir wi...

Page 28: ...lock tabs and clamps are in place and securely holding the lines to the frame Look for signs of leakage especially if you have had to add fluid to the reservoir frequently Check the tubing for kinks c...

Page 29: ...ft wheel cylinder left rear if tandem axle You should always begin the bleeding operation on the wheel cylinder that is farthest from the master cylinder Have the loose end of the hose submerged in a...

Page 30: ...DER OR WHEEL CYLINDER PISTONS REPLACE EXCESSIVE DRUM WEAR BLEED SYSTEM TRAPPED AIR IN LINES CORRECT OVERLOADED TRAILER TROUBLESHOOT SYSTEM MALFUNCTIONING ACTUATION SYSTEM ADJUST BRAKES OVERLOADED TRAI...

Page 31: ...he electromagnets in the brakes The high capacity electromagnets are energized and are attracted to the rotating armature surface of the drums which moves the actuating levers in the direction that th...

Page 32: ...ol lers provide a modulation function that varies the current to the electric brakes with the pressure on the brake pedal or amount of deceleration of the tow vehicle It is important that your brake c...

Page 33: ...wheels and tires not all trailer brakes are capable of wheel lockup If the controller is applying the trailer brakes before the tow vehicle brakes then the controller level adjustment should be adjust...

Page 34: ...romagnets that are de signed to provide the proper input force and friction characteristics Your magnets should be inspected and replaced if worn unevenly or abnormally As indicated below a straight e...

Page 35: ...ne of the tow vehicle should be running when checking the voltage so that a low battery will not affect the readings Voltage in the system should begin at zero volts and as the controller bar is slowl...

Page 36: ...6 T 16 UT 4 16 Maintenance From Trailer Harness From Trailer Harness To measure VOLTAGE measure across both brake magnet wires To measure AMPERAGE measure between one open brake magnet wire VOLTMETER...

Page 37: ...ding Individual brake amperage draw can be measured by inserting the ammeter in the line at the magnet you want to check Disconnect one of the magnet lead wires and attach the ammeter between the two...

Page 38: ...hness or malfunction are traceable to improperly adjusted or non functioning controllers See your controller manufacturers data for proper ad justment and testing procedures If the voltage and amperag...

Page 39: ...E GLAZED LININGS CORRECT CORRECT BROKEN BRAKE COMPONENTS OVERLOADED TRAILER ADJUST CLEAN OR REPLACE INCORRECT BRAKE COMPONENTS UNDERADJUSTMENT CORRECT MACHINE OR REPLACE GREASE OR OIL ON LININGS OR MA...

Page 40: ...at the weight will be off the tires The best way to jack the trailer for this is to place the jack under the trailer frame rail using a wood block to protect the finish Raise the jack until the suspen...

Page 41: ...ring 5 Check brake magnets with an ohmmeter The magnets should check at 3 2 ohms If shorted or excessively worn replace the magnets 6 Lubricate all brake moving parts BRAKE LINING CONTAMINATION Do not...

Page 42: ...ts 3 1 Structural Components Ref Quantity Description Part No 1 2 Safety Chain and HookAssembly 3 8 ASSY 2 2 FenderAssembly SA 05139 3 1 Right Hand Tail Light Bracket SA 12779 4 1 Left Hand Tail Light...

Page 43: ...page 43 T 16 UT 4 16 Parts 1 2 3 5 4...

Page 44: ...ws 1 4 20 x 2 1 2 32519 Rubber Deck Ref Quantity Description Part No 1 14 Rubber Compound Decking 9102 16 2 400 Torx Deck Screws 1 4 20 x 2 1 2 32519 Note Rubber compound decking requires additional c...

Page 45: ...165 2 1 Screw and Nut Assembly 712216 3 1 Crank Assembly Kit 800075 4 1 Screw Nut and Bearing Replacement Kit 500220 Note Kit names are bold type while component names are regular type kit compo nents...

Page 46: ...page 46 T 16 UT 4 16 Couplers Ref Quantity Description Part No 1 1 2 5 16 Coupler 75074 Parts 1...

Page 47: ...page 47 T 16 UT 4 16 Parts Ref Quantity Description Part No 1 1 Pintle Eye BDB 1250 Note Pintle Eye and associated hardware is an available option P A R T S 1...

Page 48: ...ider ShaftAssembly SA 12538 7 1 Slider Shaft Spring CT 135 11 8 1 3 8 x 4 Roll Pin G4323 9 1 Slider Shaft Bushing C 05100 10 2 E Clip PO 150STZD 10385 00117 11 1 Square U bolt 5 8 18 x 4 7 8 10094661...

Page 49: ...page 49 T 16 UT 4 16 1 Cushion Cylinder Ref Quantity Description Part No 1 1 Cushion Cylinder 30x12 P A R T S Parts...

Page 50: ...page 50 T 16 UT 4 16 3 3 Running Gear Suspension 8K Ref Quantity Description Part No 1 2 8000 Rubber TorsionAxle 7800127 1 Parts...

Page 51: ...page 51 T 16 UT 4 16 Parts P A R T S THIS PAGE LEFT BLANK INTENTIONALLY...

Page 52: ...ylinder Kit 1 00 Bore Containing 1 046 130 00 Spring 2 054 032 00 Boot 2 054 041 00 Piston 2 054 085 00 Cup 1 054 035 00 Bleeder Screw K71 080 00 7 1 Cylinder Push Rod 054 033 00 8 1 LH Spider Assembl...

Page 53: ...page 53 T 16 UT 4 16 Parts P A R T S 1 2 3 3 3 4 5 6 7 8 10 11 12 13 14 15 9 16 17 18 19 20...

Page 54: ...55 01 5 1 RHArm Shoe Retainer 071 455 02 6 1 Flange Nut 006 092 01 7 1 Magnet Kit Containing 1 042 127 00 Magnet 1 027 050 00 Magnet Retainer Clip 1 046 117 00 Magnet Spring K71 375 00 8 2 Centering S...

Page 55: ...page 55 T 16 UT 4 16 Parts P A R T S 1 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20...

Page 56: ...4 8 Wheel Stud 007 232 00 5 1 Brake Drum 8 stud on 6 5 circle 008 285 10 6 1 Oil Filler Plug 046 052 00 7 1 Outer Bearing Cup 031 028 01 8 1 Outer Bearing Cone 031 028 02 9 1 Spindle Washer 005 057 0...

Page 57: ...ls and Tires Ref Quantity Description Part No 1 1 Tire 215 75R 17 5 2 1 Wheel 17 240 3 8 Wheel Nut 1 2 20 60 6 58 Note Tires are not available through Gem State Manufacturing contact your local equipm...

Page 58: ...val Mounting Grommet 60700 6 1 License Plate Lamp 26331 7 1 Main Harness 50941 8 1 Intermediate Main Harness 88725 9 1 Front Main Harness 88719 10 1 Marker Clearance Harness 50350 0108 11 1 Marker Cle...

Page 59: ...page 59 T 16 UT 4 16 Parts P A R T S 5 4 10 9 7 2 3 2 1 8 6...

Page 60: ...ow Left Turn White Ground Brown Tail and Marker Black Electric Brake Only Accessories Black Surge Brakes Only Vehicle Back Up Lights Note For surge brake equipped trailers Wire from tow vehicle back u...

Page 61: ...et Pigtail 94619 Note Kit names are bold type while component names are regular type kit compo nents if itemized are indexed under the kit name Kit component quantities are per kit other parts and kit...

Page 62: ...26 T 16126 C 8 1 Brake Line 80 T 16080 C 9 1 Brake Line 3 16 X 20 1 2 5 Bend RH 0716 001 1 1 Brake Line 3 16 X 20 1 2 5 Bend LH 0716 001 2 1 Brake Line 3 16 X 20 3 Bend RH 0716 001 3 1 Brake Line 3 16...

Page 63: ...page 63 T 16 UT 4 16 Parts P A R T S 3 4 1 7 8 10 2 9 5 6...

Page 64: ...8 Hex Head Bolt Grade 5 05961 13 2 5 16 External Tooth Lock Washer 05424 14 4 1 4 20 UNC x 2 Hex Head Bolt Grade 5 00618 15 4 1 4 Lock Washer 00057 16 1 Emergency Lever 05951 17 1 Push RodAssembly 035...

Page 65: ...page 65 T 16 UT 4 16 Parts P A R T S 20 25 24 18 17 15 14 21 23 13 12 11 7 9 16 10 22 2 8 5 1 3 4 6...

Page 66: ...Valve 05561 3 1 Brass Fitting Str 2 HB X 10 32 NF 4 2 Crimp Clamp 10374 5 1 Straight Nipple 1 8 MPT X 1 8 MPT 10375 6 1 Brass Elbow1 8 MPT X 2 HB 7812 Note Kit names are bold type while component name...

Page 67: ...t 3 Contact a TrailMax representative in your immediate area If you do not have or can not find a representative in your area then contact the factory WarrantyAdministrator for as sistance 1 800 447 0...

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