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Bolens QT-16 - User Manual

Bolens QT-16
93 pages
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BIIIIIIIS
QS, QT & 1900
Series
Tractors
SERVICE
MANUAL
Form 552974·2 (4/83)
Supersedes 552974-1

Questions and Answers

  • R
    ruizjefferyAug 15, 2025
    What to do if the starter motor does not energize but solenoid clicks in my Bolens QT-16?
    • A
      aaron88Aug 15, 2025
      If the starter motor of your Bolens Tractor doesn't energize but the solenoid clicks, it could be due to several reasons. First, the battery might be discharged, so try charging it. Second, there may be corroded or loose electrical connections on the solenoid or starter, so check those components. Finally, the solenoid itself might be inoperative, in which case you should check it and replace it if necessary.
  • J
    Joyce WilliamsAug 18, 2025
    How to fix a Bolens QT-16 Tractor when the starter motor does not energize and solenoid does not click?
    • J
      James GloverAug 19, 2025
      If the starter motor on your Bolens Tractor isn't energizing and the solenoid isn't clicking, here's what you can check: * Ensure the attachment drive is disengaged by disengaging the PTO. * Make sure the brake pedal is fully depressed. * Inspect and clean any corroded or loose electrical connections, especially the Red/White wire at the solenoid, and tighten them. * Check the attachment drive, brake, and key switches; replace them if they aren't working. Refer to the switch testing guide for more details. * Verify the key switch is operational, replacing it if needed. Consult the solenoid testing guide. * Examine the key switch itself and replace if defective. Refer to the ignition switch test.
  • P
    Parker WoodsAug 21, 2025
    Why does my Bolens Tractor engine crank slowly?
    • A
      ariel77Aug 21, 2025
      If your Bolens Tractor engine cranks slowly, it might be due to a weak or discharged battery. Check the battery and charge or replace it if necessary. Also, check for corroded or loose electrical connections at the battery and clean and tighten them.
  • N
    Nicholas ThompsonAug 25, 2025
    How to troubleshoot lights not operating on my Bolens Tractor?
    • R
      robertoclarkAug 25, 2025
      If the lights on your Bolens Tractor are not working, the bulbs may be burned out, so replace them. Also, check for loose or poorly connected white wires or a poor black ground wire; install them properly and tighten. Finally, the light switch might be bad, so check it.
  • M
    Mr. James Harris PhDAug 27, 2025
    What to do if the battery discharges rapidly on my Bolens QT-16 Tractor?
    • J
      Jordan HardinAug 27, 2025
      If your Bolens Tractor battery discharges rapidly, check the water level and refill if it's low. If the water level is fine, the battery itself may be inoperative, and you should check it and replace it if necessary.
  • M
    Marcus AndersonAug 30, 2025
    What causes the attachment drive to be inoperative on my Bolens QT-16 (QT-1666 & 1966 series only) when the attachment drive light works?
    • M
      Mandy GonzalezAug 30, 2025
      If the attachment drive on your Bolens Tractor (QT-1666 & 1966 series only) is inoperative but the attachment drive light works, check the purple wire between the PTO switch and the electric clutch. It may be broken or loose. Also, the electric clutch itself may be inoperative, and you might need to replace it.
  • L
    Latasha WeaverSep 2, 2025
    What to do if my Bolens QT-16 battery will not charge?
    • Q
      qjonesSep 2, 2025
      If your Bolens Tractor battery will not charge, start by checking for corroded or loose battery cables; clean and tighten them. If that doesn't solve the problem, the battery itself may be inoperative, so replace it. Additionally, the diode or rectifier/regulator could be inoperative; check the diode and replace it if necessary, and check the rectifier/regulator by substitutions.
  • A
    Andrea HaasSep 5, 2025
    What causes the attachment drive to be inoperative on my Bolens QT-16 (QT-1666 & 1966 series only) when the attachment light is inoperative?
    • R
      Rebecca SanchezSep 6, 2025
      If the attachment drive on your Bolens Tractor (QT-1666 & 1966 series only) is inoperative and the attachment light is also inoperative, the attachment drive switch may be inoperative. Check it and replace if necessary. Also, check for a broken red wire between the attachment drive switch and the key switch, and replace it if necessary.
  • M
    Melanie SinghSep 8, 2025
    Why does the engine kill when the attachment drive switch is turned on in my Bolens QT-16?
    • B
      bakermarySep 8, 2025
      If the engine of your Bolens Tractor kills when the attachment drive switch is turned on, it could be because there is no operator in the seat. The seat switch must be activated either by an operator in the seat or the interlock switch button pulled up. Alternatively, the seat switch might not be adjusted properly, so adjust it so the switch is engaged when the operator is seated.
  • H
    Howard RossSep 12, 2025
    What causes continued operation of attachments when operator is not seated on my Bolens QT-16 (1666-05001 01 and later)(1966)?
    • M
      matthew01Sep 12, 2025
      If the attachments continue to operate on your Bolens Tractor (1666-05001 01 and later)(1966) when the operator is not seated, it could be due to several reasons: * The seat switch is not adjusted correctly; adjust it so the switch is disengaged when the operator is not seated. * The seat switch is inoperative; check and replace if necessary. * There are broken seat switch wires; connect or repair the blue wires between the seat switch and the attachment drive switch. * The attachment drive switch is inoperative; check and replace if necessary. * The condenser is inoperative; check and replace if necessary.

Summary

GROUP I. GENERAL

MAINTENANCE CHART

Schedule for routine maintenance tasks and intervals.

LUBRICATION CHART

Guide to lubrication points, types, and amounts.

GROUP II. ELECTRICAL SYSTEM

WIRING DIAGRAM 1660 S;N 0100101 THRU 0199999

Electrical wiring schematic for specific tractor serial number range.

TESTING ELECTRICAL SYSTEM

Procedures for testing various electrical components and circuits.

GROUP III. DRIVE TRAIN

HYDROSTATIC IDENTIFICATION & REPAIR

Procedures for identifying and repairing hydrostatic transmissions.

TRANSAXLE REMOVAL

Step-by-step guide for removing the tractor transaxle.

HYDROSTATIC REMOVAL

Procedures for removing hydrostatic transmission components.

HYDROSTATIC REPAIR

Detailed instructions for repairing the hydrostatic transmission.

TRANSAXLE ASSEMBLY PROCEDURE

Overall steps for assembling the tractor transaxle.

TRANSAXLE ASSEMBLY

Final steps and diagrams for transaxle assembly.

HYDROSTATIC REINSTALLATION

Steps for reinstalling the hydrostatic transmission unit.

TRANSAXLE REINSTALLATION

Procedures for reinstalling the tractor transaxle.

GROUP IV. FUEL SYSTEM

CARBURETOR ADJUSTMENT

Procedures for adjusting the carburetor on ONAN engines.

CARBURETOR

Adjustment procedures for KOHLER engine carburetors.

GROUP V. CHASSIS

STEERING ASSEMBLY

Overview and parts breakdown of the steering system.

STEERING GEAR REBUILDING

Instructions for rebuilding the steering gear mechanism.

BRAKE ASSEMBLY

Procedures for adjusting and servicing the brake assembly.

POWER TAKE-OFF (P.T.O.)

Installation and maintenance of the PTO system.

PTO TROUBLESHOOTING

Diagnosing and resolving problems with the PTO clutch.

GROUP VI. HYDRAULIC SYSTEM

TESTING HYDRAULIC SYSTEM

Procedures for testing hydrostatic and lift system pressures.

HYDRAULIC CONTROL VALVE REPAIR

Repair procedures for the hydraulic control valve.

GROUP VII. ENGINE

TROUBLE SHOOTING GUIDE

Diagnosing and resolving common engine problems.

ENGINE REMOVAL

General procedures for removing the tractor engine.

QT-16 ONAN ENGINE REMOVAL AND REINSTALLATION

Specific steps for removing and reinstalling the QT-16 Onan engine.

QS-16 KOHLER ENGINE REMOVAL AND REINSTALLATION

Specific steps for removing and reinstalling the QS-16 Kohler engine.

KT17 AND KT19 KOHLER ENGINE REMOVAL AND REINSTALLATION

Removal and reinstallation for Kohler KT17 and KT19 engines.

GROUP VIII. TRACTOR ATTACHMENTS

MOWER DECKS

Installation, leveling, and maintenance of mower decks.

SNOW THROWER

Installation, removal, and maintenance of snow thrower attachments.

TILLERS

Installation, removal, and maintenance of tiller attachments.

Bolens QT-16 Specifications

General IconGeneral
Horsepower16 HP
Drive Type2WD
Tires Front16x6.50-8
Fuel TypeGasoline
EngineBriggs & Stratton

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