Bobcat Three-Point Tiller Service Manual 48 60 74 Inch Models 6987115 PDF

Description

Bobcat Three-Point Tiller Service Manual 48 60 74 Inch Models 6987115 – PDF DOWNLOAD

DESCRIPTION

This is the official Bobcat Three-Point Tiller Service Manual (Document 6987115, Revision 5-10, dated May 2010), providing complete service and repair information for three Bobcat tiller attachment models designed for compact tractors.

Models Covered

• 3TIL48 – 48-inch tiller (S/N ADL700101 & Above)
• 3TIL60 – 60-inch tiller (S/N ADKY00101 & Above)
• 3TIL74 – 74-inch tiller (S/N ADL400101 & Above)

Complete Manual Structure (110 Pages)

Section 10 – Safety & Maintenance:

Troubleshooting Chart:

• Will not till deep enough – skid shoe adjustments
• Rotor will not turn – PTO engagement, slip clutch wear, obstruction removal
• Poor tilling quality – worn/damaged tines, ground speed adjustments
• Tillage not smooth – leveling board adjustments, top link settings

Service Schedule:

• Every 8 hours: Grease rotor support bearing, PTO driveline knuckles, check gearbox/transmission oil levels, inspect mounting hardware
• First 50 hours: Change gearbox and side transmission oil (initial service)
• Every 500 hours: Change gearbox and transmission oil

Daily Inspection Procedures:

• Three-point mounting frame inspection (upper/lower pins, welds, hardware)
• Three-point hitch linkage checks
• PTO shaft splines and guards verification
• Safety shield inspection

Lubrication:

• Complete lubrication point diagrams for all three models
• PTO shaft (gearbox side and tractor side) greasing
• PTO driveline shaft maintenance
• Rotary shaft bearing locations (model-specific)
• Lithium base multi-purpose grease specifications

Regular Maintenance Items:

• Skids: Inspection for cracks, damage, excessive wear; replacement procedures; bolt torque 60 ft-lb (81 N•m)
• Tines: Inspection for bent/worn tines; bolt/nut checks; replacement criteria; torque 60 ft-lb (81 N•m)
• Gearbox Fluid: Level checking procedures via dipstick (48″ model) or sight window; SAE EP 80W90 specification
• Transmission Fluid: Level verification for chain drive (48″) and gear drive (60″/74″); fill plug locations
• Cleaning: Debris removal using water/air pressure; obstruction removal from tines and driveline

Gearbox Fluid Change:

• 48″ Tiller: Plug/dipstick removal, drain procedures, refill to proper level marks
• 60″ & 74″ Tiller: Check plug/fill plug locations, level verification, proper positioning for accurate filling

Component Removal and Installation:

• Tine Replacement: Complete removal/installation procedures with torque specifications
• Skid Replacement: Mounting bolt removal, alignment, proper torque application
• Leveling Board Replacement: Adjustment procedures for smooth tillage finish
• Jack Stand Replacement: Support stand service for transport/storage

Storage and Return to Service:

• Long-term storage preparation procedures
• Pre-season inspection checklist
• Fluid level verification before operation
• Component condition assessment

Section 20 – Mainframe:

Gearbox Service (Model-Specific):

3TIL48 Gearbox (Chain Drive):

• Complete disassembly procedures with detailed figures
• Input shaft removal and installation
• Bearing replacement sequences
• Gear inspection criteria
• Seal replacement procedures
• Housing separation techniques
• Assembly lube application points
• Torque specifications for all fasteners

3TIL60 Gearbox (Gear Drive):

• Gearbox cover removal (14 bolt locations)
• Internal gear train access
• Shaft seal replacement
• Bearing race removal/installation
• Snap ring procedures
• Output shaft service
• Fluid capacity specifications

3TIL74 Gearbox (Gear Drive – Heavy Duty):

• Large capacity gearbox servicing
• Multi-shaft gear arrangements
• Heavy-duty bearing procedures
• Specialized tooling requirements
• High torque fastener specifications

Rotor Assembly Service:

3TIL48 Rotor:

• Complete rotor shaft removal from mainframe
• Tine holder bar disassembly
• Individual tine mounting procedures
• Rotor bearing replacement
• Alignment procedures
• Balancing considerations

3TIL60 Rotor:

• Extended rotor shaft service
• Multiple tine holder positioning
• Bearing support removal
• Shaft seal replacement
• Proper tine spacing verification

3TIL74 Rotor:

• Heavy-duty rotor components
• Large diameter shaft procedures
• Multiple bearing support locations
• Tine arrangement patterns
• Load distribution checks

Transmission Service:

3TIL48 Transmission (Chain Drive):

• Chain tensioner removal and installation
• Spring adjustment (under pressure – caution required)
• Chain adjuster components
• Snap ring procedures
• Gear and chain replacement
• Spacer positioning
• Proper chain tension settings
• Torque specifications

3TIL60 Transmission (Gear Drive):

• Transmission cover removal (gasket inspection)
• Gear lube draining procedures
• Internal gear inspection
• Snap ring removal sequence
• Spacer bushing service
• Bearing replacement
• Gear-to-bearing press fit procedures
• Assembly lube application
• Cover bolt torque: 18 ft-lb (24 N•m)

3TIL74 Transmission (Gear Drive – Heavy Duty):

• Large transmission cover service
• MEL1659 Spanner Socket requirement
• Center gear stud with oil-proof sealant
• Multiple gear stages
• Bearing race removal/installation
• Spanner nut procedures
• Heavy-duty component handling
• Proper gear mesh verification

Three-Point Hitch Plates:

3TIL48 Upper Three-Point Assembly:

• Plate removal (3 bolts per side)
• Spacer bushing positioning
• Mounting bolt torque: 35 ft-lb (47 N•m) for lower bolts
• Upper spacer bolt: 60 ft-lb (81 N•m)
• Alignment procedures

3TIL60 Upper Three-Point Assembly:

• Similar procedure to 48″ with 3-bolt pattern
• Category 1 hitch specifications
• Proper plate alignment techniques

3TIL74 Upper Three-Point Assembly:

• Heavy-duty plate service (4 bolts per side)
• Category 1 and 2 hitch compatibility
• All bolts: 60 ft-lb (81 N•m) torque
• Dual spacer bushing arrangement

PTO Driveline:

• U-joint removal and installation
• PTO shield service (3-bolt mounting, torque 18 ft-lb / 24 N•m)
• Driveline separation procedures
• Slip clutch inspection (dealer service item)
• Shaft length adjustment
• Guard replacement procedures
• Safety shield compliance

Technical Specifications

Key Technical Features Covered

✓ Complete exploded-view diagrams for all major assemblies
✓ Comprehensive torque specifications for SAE and metric bolts
✓ Step-by-step disassembly/reassembly procedures
✓ Gear inspection criteria and replacement guidelines
✓ Bearing removal/installation techniques
✓ Seal replacement procedures
✓ Lubrication specifications (SAE EP 80W90 gear oil)
✓ PTO driveline service and safety procedures
✓ Three-point hitch adjustment and maintenance
✓ Tine replacement patterns and spacing
✓ Rotor balancing considerations
✓ Chain tension adjustment (48″ model)
✓ Environmental fluid disposal requirements
✓ Assembly lube application points

Safety Features Emphasized

⚠ Parking brake engagement before leaving operator seat
⚠ PTO disengagement requirements during service
⚠ Secure blocking procedures when working underneath
⚠ Safety glasses required for all service operations
⚠ PTO shields and guards must remain in place
⚠ Spring under pressure warnings for chain adjusters
⚠ Proper support before component removal
⚠ Environmental compliance for fluid disposal

Component Identification

Detailed diagrams showing:

• Main frame assembly
• Upper and lower three-point pins
• PTO driveline with shields
• Transmission housing
• Gearbox mounting
• Tine arrangement patterns
• Leveling board positioning
• Jack stand locations
• Skid mounting points
• Rotor support bearings

Who Should Use This Manual

• Bobcat Authorized Service Technicians – performing warranty and maintenance work
• Compact Tractor Service Centers – repairing three-point implements
• Agricultural Equipment Mechanics – servicing tillage equipment
• Landscaping Company Technicians – maintaining grounds care attachments
• Farm Equipment Repair Shops – working on tractor implements
• Equipment Rental Facilities – servicing tiller attachments
• Municipal Maintenance Departments – grounds maintenance equipment repair
• Golf Course Maintenance Teams – specialized turf equipment service

Specialized Tools Referenced

• MEL1659 Spanner Socket (for 74″ transmission service)
• Torque wrench (various capacities for proper bolt tensioning)
• Standard hand tools (wrenches, sockets, Allen keys)
• Grease gun for lubrication
• Approved drain containers for fluid disposal

File Details

This comprehensive service manual is essential for anyone responsible for maintaining, repairing, or servicing Bobcat three-point tiller attachments. With detailed component breakdowns, complete part identification, step-by-step service procedures, and critical safety information, this manual provides everything needed to keep these tillage implements operating at peak performance in agricultural, landscaping, and grounds maintenance applications.

FILE DETAILS TABLE