1975 Bolens HT20 Rear End Issues (Hydraulic Motor & Differential)

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I've used the Bolens HT20 for some VERY light yard use so far and it has been good to me...until I started to notice that the forward and reserve was acting up!
The Bolens is pretty bulletproof when it comes to the drivetrain, but I know something isn't right. Once the engine is running at mid-full throttle, I activate the foot pedal and it moves the tractor about 1 meter and then the rear end powers the wheels inconsistently. I've gone through the check valves as well as the pressure relief valves and everything seems to be in place and like new!

In this video I decided to tear into the rear end, as I'd like to have a proper running & working tractor. Watch me remove the rear differential with the hydraulic inline motor: Sundstrand Danfoss Series 15 Model 90-1153.
I share a bunch of information on the rear end and how to get to the bolts. If you're having the same issues, I'll do my best to solve this problem in Part 2 of this video. I will disassemble the hydraulic motor/pump and eventually the differential, as I've found many chips (metal debris)
on the drain plug magnet. Let's hope it's nothing too serious!!

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𝗟𝗶𝗻𝗸 𝘁𝗼 𝗦𝘂𝗻𝗱𝘀𝘁𝗿𝗮𝗻𝗱 𝗦𝗲𝗿𝗶𝗲𝘀 𝟭𝟱 𝗠𝗼𝗱𝗲𝗹 𝟵𝟬 𝗗𝗿𝗮𝘄𝗶𝗻𝗴𝘀: https://assets.danfoss.com/documents/50377/AX152886482997en-000101.pdf
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Timestamps:
00:00 Issue Introduction
02:38 Drivetrain & Free-Wheel Valve
04:18 Removing The Fender
05:11 What Bolts To Remove
07:00 Lets Do This!
08:34 The Aftermath
10:13 Differential Visual Inspection
12:33 Hydraulic Motor Plan

Видео 1975 Bolens HT20 Rear End Issues (Hydraulic Motor & Differential) канала Workshop Rebuild