Thomas ProTough 300 Screener

Questions and Answers

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Krystal StanleyAug 15, 2025
Why Thomas Farm Equipment will not start?
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  Emily JohnsonAug 15, 2025
  If your Thomas Farm Equipment won't start, several factors could be at play. It could be due to low cranking speed, in which case you should check the battery charge. Another reason could be no fuel, so replenish the fuel and check for air in the fuel system or any blockages. Other potential causes include a faulty stop solenoid, fuel pump, or injection system, all of which should be checked and replaced or repaired as necessary. Improper preheating of the engine, faulty glow plugs, incorrect valve timing, a clogged air filter, or worn engine components could also be the reason.
M
Matthew GreenAug 18, 2025
What to do if Thomas ProTough 300 Screener is difficult to start?
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  codyellisonAug 18, 2025
  If your Thomas Farm Equipment is hard to start, the issue could stem from several causes. Start by checking the battery charge if the cranking speed is low. Also, inspect and replace the stop solenoid if it's faulty. Other potential problems include a blocked fuel system, a faulty fuel pump, or a clogged air filter, all of which may need checking and repair or replacement. Additionally, there might be air or contaminants in the fuel system, a faulty injection system or glow plug, incorrect valve timing, or worn engine components.
J
Julia ChavezAug 21, 2025
Why is Thomas ProTough 300 Screener Farm Equipment shakerhead operating slow?
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  Andrew McdonaldAug 21, 2025
  A slow-operating shakerhead on your Thomas Farm Equipment can be attributed to several factors. Begin by checking and replenishing the hydraulic fluid if it's low. Also, inspect and adjust the engine RPM if it's low. Other potential causes include hydraulic pump or motor leakage/wear, a broken key, or bearing damage. In such cases, check the pressure/flow or replace the key or bearings as necessary.
D
dianefowlerAug 25, 2025
What causes low cranking speed in Thomas ProTough 300 Screener Farm Equipment?
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  Dalton SmithAug 25, 2025
  Low cranking speed in your Thomas Farm Equipment can be caused by a low battery charge. In this case, you should charge the battery and check the electrical connections and alternator capacity. Another possible cause is a faulty starter motor, which should be checked and repaired.
C
Courtney JohnsonAug 28, 2025
What to do if Thomas ProTough 300 Screener cylinders will not operate?
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  Michael WrightAug 28, 2025
  If the cylinders on your Thomas Farm Equipment are not operating, it could be due to a couple of reasons. The engine RPM might be too low, in which case you should check and adjust it. Alternatively, the hydraulic fluid might be low or there could be a fluid leak. If so, replenish the fluid and check and repair any leaks.
K
kimberlywilliamsSep 1, 2025
Why Thomas Farm Equipment shakerhead will not move?
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  Danielle MckeeSep 1, 2025
  If the shakerhead on your Thomas Farm Equipment isn't moving, several issues could be the cause. It could be due to low hydraulic fluid, so replenish it. Other potential causes include a broken key, hydraulic pump or motor failure, or bearing seizure. Check and replace the key or bearings, and check the pressure/flow of the hydraulic pump or motor.
B
Betty WestSep 4, 2025
What causes rapping noise from Thomas ProTough 300 Screener Farm Equipment shaker deck area?
- A
  Ashlee SmallSep 4, 2025
  A rapping noise from the shaker deck area of your Thomas Farm Equipment could be due to loose screen tension bolts, which should be tightened to specification. It may also be caused by worn crown bar rubber, which should be replaced. Another possible cause is an engine RPM that is too high, so check and adjust it.
B
Brandon WarrenSep 7, 2025
Why is there loud howling noise when Thomas ProTough 300 Screener Farm Equipment shaker is engaged?
- C
  charlesmorganSep 7, 2025
  A loud howling noise when the shaker is engaged on your Thomas Farm Equipment likely indicates that the shakerhead bearing is failing, in which case you should check and replace it.
J
Jerry BarnesSep 12, 2025
Why is screen cloth broken on Thomas ProTough 300 Screener?
- D
  dwayne68Sep 12, 2025
  Broken screen cloth on your Thomas Farm Equipment may be due to loose screen tension bolts, which should be tightened to specification. Another possible cause is worn crown bar rubber, which should be replaced.

Summary

1. SAFETY PRECAUTIONS

1.1 GENERAL INSTRUCTIONS

Read manual, ensure decals are in place, and follow safe operation guidelines.

OPERATING THE MACHINE

Precautions for towing, grades, clearances, road travel, electrical lines, parking, and bystanders.

MAINTENANCE SAFETY

Safety during maintenance, refueling, avoiding modifications, pressure systems, and protective gear.

1.2 DECALS

Location and identification of safety and warning decals on the machine.

1.3 ORIENTATION; ACCESS

Familiarization with component locations, controls, and indicators on the machine.

2. CONTROLS

Engine Controls

Description of engine-related controls, including instrument panel and throttle.

Hydraulic and Axle Controls

Description of hydraulic and axle control levers for machine operation.

3. OPERATION

Pre - Start Inspection

Daily inspection of engine, hydraulics, and shakerhead before operation.

Starting Instructions

Step-by-step procedure for starting the engine and machine safely.

Shut Down Procedure

Correct steps to safely shut down the engine and machine.

Set - up

Procedures for preparing the machine for operation, including hitch and axle adjustments.

Operating Procedures

Guidelines for efficient and safe operation, including material handling.

Securing and Transporting

Instructions for safely securing and transporting the machine.

4. MAINTENANCE

Service Access Areas

Locations for accessing components for service and maintenance.

Preventative Maintenance Schedule

Schedule for routine maintenance tasks based on operating hours.

Daily Service

Essential checks and tasks to perform daily before operating the machine.

150 Hour Service

Maintenance tasks required every 150 operating hours, starting at 50 hours.

300 Hour Service

Maintenance tasks required every 300 operating hours, plus 150-hour tasks.

500 Hour Service

Maintenance tasks required every 500 operating hours.

900 Hour Service

Maintenance tasks required every 900 operating hours, including system flushes.

As Required Service

Maintenance tasks performed as needed, such as screen replacement.

Electrical Schematic, Chassis

Wiring diagram for the chassis electrical system.

Electrical Schematic, Engine

Wiring diagram for the engine electrical system.

Hydraulic Schematic

Diagram illustrating the hydraulic system components and connections.

Trouble Shooting

Common symptoms, probable causes, and solutions for machine issues.

5. SPECIFICATIONS

DIMENSIONAL SPECIFICATIONS

Physical dimensions of the machine, including length, height, and width.

PERFORMANCE SPECIFICATIONS

Details on material capacity, cycle time, weight, and fluid capacities.

FASTENER TORQUE SPECIFICATIONS

Torque values for various fasteners and bolt grades.

6. REPLACEMENT SCREENS

Screen Selection and Tips

Guidance on choosing appropriate screens based on material and application.

Replacement Screen Information

Information on standard screen configurations and ordering.

7. WARRANTY INFORMATION

MACHINES PURCHASED THROUGH THOMAS DEALER

Information regarding warranty terms, registration, and claims for dealer-purchased units.

8. PARTS MANUAL

8.1 MAINFRAME

Components related to the main structural frame of the machine.

8.1.1 HITCH

Parts list and diagram for the hitch assembly.

8.1.2 FRONT LIFT ASSEMBLY

Parts list and diagram for the front lift assembly.

8.1.3 AXLE; WHEEL ASSEMBLY

Parts list and diagram for the axle and wheel components.

8.1.4 AXLE LOCK

Parts list and diagram for the axle lock mechanism.

8.1.5 COMPARTMENT DOORS

Parts list and diagrams for access panels and doors.

8.1.6 MUD FLAPS

Parts list for mud flap components.

8.1.7 RUBBER SKIRTING

Parts list for rubber skirting components.

8.2 SHAKERHEAD

Components related to the shakerhead assembly.

8.2.1 SHAKERHEAD AND SPRINGS

Parts list and diagram for the shakerhead and spring assembly.

8.2.2 SHAKER SHAFT ASSEMBLY

Parts list and diagram for the shaker shaft assembly.

8.2.3 SCREENS; PLATES

Parts list and diagrams for shaker screens and plates.

8.3 HYDRAULICS

Components and diagrams of the hydraulic system.

8.3.1 HYDRAULIC CIRCUIT

Diagram and parts list for the hydraulic system circuit.

8.3.2 CONTROL VALVE

Parts list and diagrams for hydraulic control valves.

8.3.3 CYLINDERS

Parts list and exploded view of hydraulic cylinders.

8.3.4 GEAR PUMP

Parts list and diagram for the hydraulic gear pump.

8.3.5 SHAKER MOTOR

Parts list and diagram for the shaker motor.

8.3.6 HYDRAULIC OIL TANK

Parts list and diagram for the hydraulic oil tank.

8.4 ELECTRICAL

Electrical system components and diagrams.

8.4.1 ENGINE ELECTRICAL

Wiring diagrams and parts list for the engine electrical system.

8.4.2 CHASSIS ELECTRICAL

Wiring diagrams and parts list for the chassis electrical system.

8.5 ENGINE

Engine system components and diagrams.

8.5.1 INTAKE SYSTEM

Parts list and diagram for the engine air intake system.

8.5.2 EXHAUST SYSTEM

Parts list and diagram for the engine exhaust system.

8.5.3 RADIATOR AND MOUNTS

Parts list and diagrams for the radiator, hoses, and mounting components.

8.5.4 THROTTLE CONTROL

Parts list and diagram for the engine throttle control mechanism.

8.5.5 FUEL SYSTEM

Parts list and diagram for the engine fuel system components.