Ordering a drive chain, tilt cylinder or quick-lock part for a Gehl skid loader starts with the right number, and this 76-page Gehl SL6620 parts catalog PDF (OEM ID 904513) is where you find it for the 6620 and SL6620. Each section breaks an assembly down to its individual parts, from the chassis and planetary gearcase through the lift arm, hand brake and wiring harness. Hydraulic breakdowns separate the standard single gear pump from the optional dual gear pump, list Rexroth and Cessna versions apart, and cover the tandem hydrostatic pump, main control valve and self-leveling valves. Confirm your serial number first. Auxiliary and backhoe hydraulics are listed separately for units before SN3301 and after SN3300. When the order is a grapple cylinder or a set of pallet forks, the numerical index ties each part number back to its assembly. Bookmarked and text-searchable, the PDF goes with you wherever the loader is working.
What's Inside This Gehl 6620, SL6620 Parts Manual
| System | Pages | Key Topics |
|---|---|---|
| Introduction | 2 | |
| Decal Locations | 4-7 | Safety Decal Information, Paint Notice, Decal Kit Contents, Decal Application Instructions, Decal Location Photographs |
| Chassis, Fuel Tank, Grill & Access Covers | 8-9 | Fuel Tank Assembly, Chassis Assembly, Grill Assembly, Access Covers, Floor Plate, Latch and Rod Assembly |
| Axles, Drive Chains & Related Components | 10-11 | Planetary Gearcase Assembly, Wheel Adapter, Drive Chains, Axle Assembly, Wheel and Tire Assembly, Sprocket and Idler Assembly |
| Encloser (ROPS), Seat & Engine Cover | 12-13 | Overhead Guard, Seat Assembly, Restraint Bar Assembly, Engine Cover, Window and Weatherstrip, Seat Adjuster |
| Instrument Panel, Wiring & Electrical Components | 14-15 | Instrument Panel, Wiring Harness, Battery and Holddown, Ignition Switch, Gauges, Lights and Mounting |
| Engine & Related Components | 16-17 | Starting Motor, Alternator, Fan Belt, Engine Mount, Throttle Control, Pedal Assembly, Fuel and Oil Filter |
| Air Cleaner, Muffler & Radiator | 18-19 | Air Cleaner Assembly, Muffler and Spark Arrestor, Radiator Assembly, Fan Shroud, Exhaust Pipe, Radiator Hoses |
| Hydraulic Pump, Filters, Control Valve & Oil Cooler | 20-29 | Single Gear Pump - Standard Equipment, Dual Gear Pump - Optional Equipment, Hydrostatic Drive Components, Lift/Tilt & Traction T-Bar Controls |
| Auxiliary & Backhoe Hydraulics | 30-33 | Before SN3301, After SN3300 |
| Lift Arm & Quick-Lock Mechanism | 34-35 | Lift Arm, Safety Arm, Lift Cylinder, Tilt Cylinder, Attachment Pin, Bushing |
| Hand Brake | 36-37 | Brake Caliper, Disc, Hub, Brake Handle, Cable, Clamp |
| Sound Deadening Components | 38 | Foam Pad, ROPS Side, Seat Back, Roof Acoustic, ROPS Deck |
| Hydraulic Components | 39-48 | Lift Cylinder, Tilt Cylinder, Grapple Cylinder, Planetary Gearcase, Drive Motor, Tandem Hydrostatic Pump, Single Gear Pump, Dual Gear Pump |
| Accessories | 49-59 | Backup Alarm, Enclosed Alternator, Horn Kit, Dual Flasher Kit, Strobe Light & Amber Warning Beacon, High Flow Pump Kit, Rigid All-Weather Enclosure, Hydraulic Oil Heater Kit |
| Attachments | 60-66 | Buckets, Utility Grapple, Pallet Forks, Utility Fork, Brooms, Trenchers, Augers & Sweeper/Bucket, Snow Blower & Truck Loading Spout |
| Hardware Torque Specifications | 75-76 | Bolt Size, Dry Torque, Lubricated Torque, Grade 2, Grade 5, Grade 8 |
Gehl 6620, SL6620 Common Problems This Manual Covers
Gehl SL6620 hydraulic filter element, oil strainer and control valve part numbers hard to find
Check the single gear pump exploded view on page 20, then match reference numbers to the parts list on page 21. Order filter element 074830 for hydraulic filter 074020, oil strainer 055013 and control valve 079107. On dual gear pump machines, page 23 adds oil filter assembly 082572 with element 048959. Verify your serial against the SN3300/SN3301 tubing break.
Manual Section: Hydraulic Pump, Filters, Control Valve & Oil Cooler p. 21Wrong seat switch or instrument harness ordered because the parts list splits by serial number
Verify the serial number using the location guide in the introduction on page 2, then check the electrical parts list on page 15. Use seat switch 080868 after SN2650 (seat 079291) or with seat 079292; use 076057 before SN2651. Harness 083497 fits after SN3125, 079260 before SN3126. For harness replacement, order items 31, 36 and 47.
Manual Section: Instrument Panel, Wiring & Electrical Components p. 15Replacement battery size, 30 amp fuse, 20 amp fuse and relay part numbers needed
Check the instrument panel and electrical parts list on page 15. Order fuse 079259 for the 30 amp holder 079258 and fuse 071149 for the 20 amp holder 069745. Relay 076058 is used twice. Buy the battery locally to the listed spec: Group 31, 650 cold-cranking amps, top post mounting, held by holddown assembly 078998.
Manual Section: Instrument Panel, Wiring & Electrical Components p. 15Tandem pump boost control, seal kit and drive motor part numbers needed for hydrostatic drive
Check the hydrostatic drive exploded view on page 24 and the parts list on page 25. Boost control 087215 is used after SN3300; 079025 is used before SN3301. For bronze bushing repair or a complete control, order 087215. The seal kit is 080589. Drive motor 079034 (two used) takes gasket 054783; the tandem pump is 079024.
Manual Section: Hydrostatic Drive Components p. 25Lift cylinder, tilt cylinder and self-level valve part numbers change with serial number
Check the main control valve detail on page 28, then the lift and tilt parts list on page 29. Lift cylinders are 079240 and tilt cylinders are 079241, two of each. Self-level valve 087274 applies after SN3500; a different valve is listed before SN3501, so verify your serial first. Grease fittings are 570005 (90 degree) and 570002.
Manual Section: Lift & Tilt Cylinders p. 29Drive chain, sprocket and idler parts hard to identify on the axle assembly
Check the Axles, Drive Chains & Related Components exploded view on page 10 and match every reference number to the parts list on page 11. The section covers drive chains, the sprocket and idler assembly, the axle assembly, the wheel adapter and the planetary gearcase. Confirm model and serial number with the location guide on page 2 before ordering.
Manual Section: Axles, Drive Chains & Related Components p. 10Frequently Asked Questions
What is the part number for the FLANGE/TANK in this manual?
Page 9 lists part number 079483 for the FLANGE/TANK. p. 9
What is the part number for the RING/RETAINING in this manual?
Page 11 lists part number 078962 for the RING/RETAINING. p. 11
What is the part number for the WEATHERSTRIP/WINDOW T&B in this manual?
Page 13 lists part number 072839 for the WEATHERSTRIP/WINDOW T&B. p. 13
What is the part number for the LAMP/HEAD in this manual?
Page 15 lists part number 073037 for the LAMP/HEAD. p. 15
What is the part number for the TUBE/FUEL in this manual?
Page 17 lists part number 078917 for the TUBE/FUEL. p. 17
What format is this Gehl 6620 manual in?
Instant PDF download. You get the full 76-page searchable Parts Catalog immediately after payment. Open it on your laptop, tablet, or phone right in the shop.
Can I print this Gehl 6620 manual?
Yes. Many buyers print one chapter at a time for their own shop and keep the rest on a tablet.
