Description

Bolens 5019H, 5020H 1986 Parts Catalog

If you’re wrenching on a Bolens 5019H, 5020H 1986 Parts Catalog and don’t have the factory parts list, you’re burning time. I’ve watched guys spend an hour trying to figure out which seat bracket fits a 5020H when the part number is right there on page 3. This 16-page catalog from 1986 covers both the 5019H (19 HP) and 5020H (20 HP) across serial numbers 0100101 through 0199999. It’s the only way to know you’re ordering the correct nut, washer, or actuator bracket without guessing.

Seat Assembly Parts (Page 3)

Page 3 breaks down the seat and mounting hardware. The seat itself is part 1748757. The seat support is 1734115. Four flat washers (1107383, 3/8”) hold it together. The adjusting knob (1734269) is a common breakage point – order two. The actuator bracket (1734515) is unique to these models. If you need the spring that returns the knob, that’s part 1733960. All quantities are listed so you don’t over-order. That’s the difference between a factory catalog and a parts diagram off a forum.

Serial Number Verification – Why It Matters

Bolens used serial number splits even within the same model year. Page 1 clearly states: Model 5019H serial 0100101 thru 0199999; Model 5020H same range. If your tractor is outside that – say a 1987 build – some parts won’t match. The seat support bracket changed shape after 0199999. I’ve had customers bring in a 5020H with a later serial and the adjusting knob doesn’t align. The catalog saves that mistake. Always check your serial before you open your wallet.

Does This Parts Catalog Include Torque Specs?

No. This is a parts catalog, not a service manual. It lists part numbers, descriptions, and quantities. You won’t find head bolt torque or fluid capacities here. For that, you need the corresponding shop manual. But if you’re ordering parts, this is the only source that guarantees you get the exact factory piece. Don’t rely on aftermarket cross-reference sheets – they’re wrong as often as they’re right.

3 Reasons to Use Factory Parts Catalogs Over Aftermarket

First, factory catalogs carry supersession data. Part numbers get updated; aftermarket books often print the old number and you receive a box that doesn’t fit. Second, the illustrations are specific to the assembly. On page 3, the actuator bracket (1734515) is shown with its correct hardware – a nut and washer (1735125). An aftermarket drawing might combine them into a generic “bracket kit” missing the spring. Third, this catalog includes what Bolens called “Form P4025-2” dated 12/86. That means you’re getting the final production revision, not a first-print copy that omitted the updated seat support. Aftermarket reprints often skip revision dates entirely. That’s a gamble I wouldn’t take on a 30-year-old tractor.

Guessing costs money.

Using the Parts List to Avoid Return Trips

Before you call your parts counter, have this catalog open. Write down the part numbers directly from the table. For the seat assembly, you need items 1 through 10. Note the quantities – item 3 requires 4 washers. Don’t order one. The nut & washer assembly (1735125) is a single part, not two separate pieces. Small details like that save a return trip. Every experienced mechanic knows: the cost of a wrong part isn’t just the price, it’s the downtime. This 16-page catalog eliminates that downtime.

Frequently Asked Questions

Can I use this catalog to find torque specs for head bolts?

No. This is a parts catalog, not a service manual. It lists part numbers and quantities, not tightening sequences or torque values. You need a separate shop manual for that.

Why do I need to match serial numbers for the 5019H and 5020H?

Bolens changed parts across production runs. The 1986 5019H covers serial numbers 0100101 through 0199999. If your tractor falls outside that range, some parts listed (like the seat support, part 1734115) might not fit. Always verify serial number before ordering. I’ve seen guys order a complete seat assembly for a 5020H only to find the adjusting knob (part 1734269) doesn’t line up because their unit is a later build. This catalog saves that headache by showing exactly what was used for that range. That’s worth the price of admission.

Related Manuals

• FMC Bolens 1666 Parts Catalog – 23 Page Factory Parts List
• FMC Bolens 1660 Parts Catalog – 23-Page Factory Parts List
• FMC Bolens 1055 Parts Catalog – 16-Page Factory Parts List OEM

For background on how OEM parts catalogs fit into the broader Automotive Industry Overview, see the Automotive Industry Overview. That context helps understand why factory documentation matters.

If you’re tired of returns and wrong parts, get the factory data. Access the Factory Manual and keep it on your bench.