Maxon TE-250C Maintenance Manual Download Page 31 | Manualshive

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1

1921 Slauson

A

ve. Santa Fe Springs, CA. 90670 (800) 227-41

16 F

AX (888) 771-7713

31

SYSTEM DIAGRAMS

PUMP & MOTOR SOLENOID OPERATION (GRAVITY DOWN)

GRAVITY DOWN POWER UNIT

FIG. 31-1

TABLE 31-1

POWER UNIT MOTOR & SOLENOID OPERATION

LIFTGATE

FUNCTION

PORT

SOLENOID OPERATION

( MEANS ENERGIZED)

MOTOR

VALVE

“S2”

LOCK

VALVE

RAISE

A

-

-

LOWER

VENT

-

REFER TO VALVES SHOWN ON

HYDRAULIC SCHEMATIC

STARTER

SOLENOID

MOTOR

DIRECTION OF

CONTROLLED

FLOW

“S2” VALVE

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Summary of Contents for TE-250C

Page 1: ...M 17 12 REV B APRIL 2020 2020 MAXON Lift Corp...

Page 2: ......

Page 3: ...cessing All claims for warranty will be denied if paperwork has not been received or claim submitted via Maxon website for processing by MAXON s Warranty Department within 30 days of repair date All c...

Page 4: ...RSION SPRING 18 DECALS TE 25DC TE 33 24 DECALS PLATES 26 DECALS TEWR 25DC TEWR 33 28 DECALS PLATES 30 SYSTEM DIAGRAMS 31 PUMP MOTOR SOLENOID OPERATION GRAVITY DOWN 31 HYDRAULIC SCHEMATIC GRAVITY DOWN...

Page 5: ...PLATFORM RAISES BUT LEAKS DOWN 40 PLATFORM RAISES PARTIALLY AND STOPS 42 LIFTGATE WILL NOT LIFT RATED CAPACITY 44 PLATFORM WILL NOT LOWER LOWERS TOO SLOWLY OR TOO QUICKLY 46...

Page 6: ...15 Added Phillips 66 Arctic Low Pour oil to table of recommended ISO 15 oils 19 Added instructions for installing torsion springs correctly to assist with unfolding and folding different combinations...

Page 7: ...THIS PAGE INTENTIONALLY LEFT BLANK...

Page 8: ...by Recommended practices for welding on steel parts are contained in the current AWS American Welding Society D1 1 Structural Welding Code Steel Damage to Liftgate and or vehicle and personal injury c...

Page 9: ...ediately seek first aid If acid gets on your skin immediately wash it off with soap and water If an emergency situation arises vehicle or Liftgate while operating the Liftgate release the con trol swi...

Page 10: ...s CA 90670 800 227 4116 FAX 888 771 7713 10 LIFTGATE TERMINOLOGY WEDGE FLIPOVER LIFT ARM PLATFORM PARALLEL ARM PUMP ASSEMBLY COVER IS SHOWN CONTROL SWITCH PLATFORM OPENER EXTENSION PLATE LIFT CYLINDER...

Page 11: ...gs or replace parts as required Check electrical wiring for chafing and make sure wiring connections are tight and free of corrosion Use dielectric grease to protect electrical connections Check that...

Page 12: ...hten loose fittings or replace parts as required Check electrical wiring for chafing and make sure wiring connections are tight and free of corrosion Use dielectric grease to protect electrical connec...

Page 13: ...linder lift arm parallel arm and opener There are also lube fittings at the same places on the LH cylin der lift arm and parallel arm Refer to the PERIODIC MAINTENANCE CHECKS and PERIODIC MAINTENANCE...

Page 14: ...G PUMP COVER FIG 14 1 3 If needed add fluid to the reservoir as fol lows Pull out no threads filler cap FIG 14 2 Fill the reservoir with hydraulic fluid to level shown in FIG 14 2 Reinstall filler cap...

Page 15: ...ENDED BRANDS PART NUMBER CHEVRON HIPERSYN 32 KENDALL GOLDEN MV SHELL TELLUS S2 VX 32 EXXONMOBIL UNIVIS N 32 DTE 24 ISO 15 OR MIL H 5606 HYDRAULIC OIL RECOMMENDED BRANDS PART NUMBER CHEVRON FLUID A AW...

Page 16: ...ees F Grade ISO 32 Below 70 Degrees F Grade ISO 15 or MIL H 5606 NOTE Use correct grade of hydraulic fluid for your location See TABLES 15 1 15 2 for recommended brands 1 Unbolt and remove pump cover...

Page 17: ...prevent it from becoming a hazard To secure pump cover the long side of the holder flats must butt against pump cover as shown in the illustration 7 Bolt on the pump cover as shown in FIG 17 1 Torque...

Page 18: ...3 Raise platform to a convenient work height to gain access FIG 18 1 There should not be tension on the torsion spring in this position 4 Drive out the roll pin from pin collar on the platform hinge...

Page 19: ...H TORSION SPRING SHOWN POSITIONED IN HOLE 1 FIG 19 1A BRACKET LONG LEG SPRING PIN SPRING BRACKET LOCATION TYPE OF PLATFORM HOLE TO BE USED RH SIDE STEEL PLATFORM FLIPOVER 1 RH SIDE STEEL PLATFORM ALUM...

Page 20: ...hinge pin inboard to correct position through the platform hinge bracket FIG 20 1 Line up the hole in the platform hinge pin with the hole in the pin collar Install the roll pin through the pin collar...

Page 21: ...11921 Slauson Ave Santa Fe Springs CA 90670 800 227 4116 FAX 888 771 7713 21 THIS PAGE INTENTIONALLY LEFT BLANK...

Page 22: ...ent is needed If indica tions are incorrect continue with instruction 2 TABLE 22 1 2 Make sure platform is still at ground level If the shackle is not touching the ground mea sure and compare distance...

Page 23: ...ETAL FROM PLATFORM STOP 7 8 1 16 2 1 8 3 3 16 3 15 16 1 4 PLATFORM DOES NOT TOUCH GROUND FIG 23 1 GRINDING PLATFORM STOPS CURBSIDE SHOWN FIG 23 3 4 RAISE the platform to comfortable work height Fold f...

Page 24: ...ommon sense when locating these decals on vehicle NOTE Ensure there is no residue dirt or corrosion where decals are attached If necessary clean surface before attaching decals FIG 24 1 INSTRUCTION DE...

Page 25: ...Santa Fe Springs CA 90670 800 227 4116 FAX 888 771 7713 25 DECAL SHEET P N 282522 01 FIG 25 1 CAPACITY DECALS TABLE 25 1 MODEL DECAL P N CAPACITY TE 25DC 220382 2500 POUNDS 1134 KG TE 33 220388 02 33...

Page 26: ...11921 Slauson Ave Santa Fe Springs CA 90670 800 227 4116 FAX 888 771 7713 26 DECALS PLATES FIG 26 1 MAXON NAME PLATE P N 280004 01 SERIAL PLATE REF PAINT DECAL PAINTED ONLY P N 267338 01...

Page 27: ...11921 Slauson Ave Santa Fe Springs CA 90670 800 227 4116 FAX 888 771 7713 27 THIS PAGE INTENTIONALLY LEFT BLANK...

Page 28: ...se when locating these decals on vehicle NOTE Ensure there is no residue dirt or corrosion where decals are attached If necessary clean surface before attaching decals FIG 28 1 WARNING DECAL P N 26544...

Page 29: ...670 800 227 4116 FAX 888 771 7713 29 DECAL SHEET P N 282522 01 FIG 29 2 CAPACITY DECALS TABLE 29 1 MODEL DECAL P N CAPACITY TEWR 25DC 220382 2500 POUNDS 1134 KG TEWR 33 220388 02 3300 POUNDS 1500 KG F...

Page 30: ...11921 Slauson Ave Santa Fe Springs CA 90670 800 227 4116 FAX 888 771 7713 30 DECALS PLATES FIG 30 1 MAXON NAME PLATE P N 280004 01 SERIAL PLATE REF PAINT DECAL PAINTED ONLY P N 267338 01...

Page 31: ...OPERATION GRAVITY DOWN GRAVITY DOWN POWER UNIT FIG 31 1 TABLE 31 1 POWER UNIT MOTOR SOLENOID OPERATION LIFTGATE FUNCTION PORT SOLENOID OPERATION MEANS ENERGIZED MOTOR VALVE S2 LOCK VALVE RAISE A LOWE...

Page 32: ...TY DOWN FIG 32 1 M 3 GPM FLOW CONTROL VALVE VALVE S2 RELIEF VALVE SET AT 3250 PSI PUMP MOTOR REF RESERVOIR CHECK VALVE FILTER DRAIN HOLE PLUGGED HYDRAULIC CYLINDERS FILL HOLE PLUGGED HYDRAULIC LOCK VA...

Page 33: ...16 FAX 888 771 7713 33 ELECTRICAL SCHEMATIC GRAVITY DOWN FIG 33 1 DOWN UP CONTROL SWITCH STARTER SOLENOID MOTOR FUSE HOLDER WITH 10 AMP FUSE JUNCTION BLOCK WHITE BLACK GREEN 1 2 2 1 CYCLE COUNTER IF E...

Page 34: ...DOWN POWER UNIT FIG 34 1 TABLE 34 1 POWER UNIT MOTOR SOLENOID OPERATION LIFTGATE FUNCTION PORT SOLENOID OPERATION MEANS ENERGIZED MOTOR VALVE S2 VALVE S1 LOCK VALVE RAISE A LOWER B REFER TO VALVES SH...

Page 35: ...HEMATIC POWER DOWN FIG 35 1 HYDRAULIC CYLINDERS PORT B POWER DOWN PORT A RAISE RELIEF VALVE 2 SET AT 1100 PSI PUMP AUX HAND PUMP PORT PLUGGED VALVE S2 RESERVOIR DRAIN HOLE PLUGGED FILTER MOTOR REF REL...

Page 36: ...11921 Slauson Ave Santa Fe Springs CA 90670 800 227 4116 FAX 888 771 7713 36 ELECTRICAL SCHEMATIC POWER DOWN FIG 36 1 SYSTEM DIAGRAMS Continued...

Page 37: ...S1 Coil Resistance 6 6 70 F 15 26 7 70 F 15 S1 Ampere 1 8A 0 9A S2 Coil Resistance 7 5 70 F 15 30 8 70 F 15 S2 Ampere 1 6A 0 78A Coil terminal torque 15 45 lb in max Valve cartridge torque 25 30 lb ft...

Page 38: ...uch heavy jumper cables to terminals A B FIG 38 1 a If motor runs replace the motor solenoid b If motor does not run repair or replace the pump motor 1 Connect voltmeter between motor solenoid termina...

Page 39: ...relief valve FIGS 39 1 and 39 2 Clean or replace relief valve if necessary CHECKING THE RAISING RELIEF VALVE POWER DOWN POWER UNIT FIG 39 2 Keep dirt water and other contaminants from entering the hy...

Page 40: ...gized Connect voltmeter negative lead to ground wires connection on pump and positive lead to terminal on the A lowering solenoid valve FIG 40 1 If voltmeter reads battery voltage check for faulty wir...

Page 41: ...ulic fluid reservoir filler cap drain plug and hydraulic lines clean up contaminants that can get in the openings Also protect the openings from accidental contamination during maintenance CAUTION REM...

Page 42: ...er load from pump motor 3 Check for structural damage and poor lubrication Replace worn parts TROUBLESHOOTING CHECKING THE RAISING RELIEF VALVE GRAVITY DOWN POWER UNIT FIG 42 1 RELIEF VALVE ADJUSTMENT...

Page 43: ...draulic line from the LOWER port on the cyl inder FIG 43 1 Hold the control switch in the RAISE position for two seconds while you watch for hydraulic fluid at the LOWER port A few drops of hydraulic...

Page 44: ...valve is dirty Clean or replace relief valve if necessary 1 Use voltmeter to verify the battery voltage is 12 6 volts or more under load from pump motor 2 Check for structural damage or lack of lubric...

Page 45: ...OWER port on the cylinder FIG 45 1 Hold the control switch in the RAISE position for two seconds while you watch for hydraulic fluid at the LOWER port A few drops of hydraulic fluid escap ing the port...

Page 46: ...erminal FIG 46 2 Hold control switch in the LOWER position Then connect voltmeter lead to terminal on the S2 lower ing solenoid valve FIG 46 2 If voltmeter shows a much lower reading than 12 6 volts d...

Page 47: ...plunger does not move with a smooth spring loaded action approxi mately 1 8 replace the valve cartridge Re install lowering solenoid valve if good or a replacement Torque valve cartridge to 25 30 lb...

Page 48: ......

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