iFixit - Answers With Device "John Deere"

John Deere LT155: How to replace engine

Fri, 30 Jan 2026 12:01:37 -0700

How do I replace engine

⟐ Answered January 30, 2026 at 12:01 MST

John Deere: Gas in crankcase is engine ruined

Tue, 29 Jul 2025 16:33:15 -0700

Have a JD Z465 with briggs 27hp. Forgot to shut fuel off after cutting grass last time. Went to start it, had to choke it, bluish smoke came billowing out the exhaust. Checked the oil and it was full of gas. Drained the oil, flushed with clean oil, new filter, new oil, still blowing bluis smoke like crazy. Is the engine ruined?

⟐ Commented July 29, 2025 at 16:33 MST

John Deere: John Deere GX335 deck height adjuster doesnt work

Fri, 04 Jul 2025 15:18:51 -0700

The knob turns freely but doesnt adjust. The knob is not broken, its not the style on youtube where the plastic breaks. I can turn the knob but the adjuster underneath does not turn. I can turn the adjuster underneath by hand. Not sure even how to get to it to repair it when i do find the cause, there are a lot of pulleys and such in the way. Any help is appreciated.

John Deere LX176 lawnmower: height adjustment nob will not turn

Sat, 26 Oct 2024 14:01:02 -0700

how to fix height adustment nob that will not move

John Deere 870: Lift will not go down.

Sat, 06 Jul 2024 11:24:44 -0700

Lift is stuck. In raised position. Oil level is fine. Shaft from lifting lever ( right side) to linkage control lever ( left side) seems to be working ( not broken, connected properly, etc.) Many loose and chewed or cutwires. PTO works fine. Any ideas?

John Deere: Why does my tractor stall out when mowing when I come to a stop?

Sun, 22 Oct 2023 02:50:33 -0700

I have a 1025e john deere and in order to get mower to start, I have to start moving. It doesn't come on as soon as I move but within a minute the mower will start. When I come to a stop the whole tractor will stall out. I though maybe the mower deck was not connected correctly but I disconnected it and hooked it back up and that doesn't seem to change anything. Though this problem may be a sensor but I have no idea where to start checking the sensors.

⟐ Answered October 22, 2023 at 2:50 MST

John Deere: JD 870 with 440 loader control valve repair kit

Mon, 18 Sep 2023 17:06:08 -0700

Does anyone have the part number for rebuilding the control valve on an 440 front end loader that is attached to a John Deere 870 ?

⟐ Commented September 18, 2023 at 17:06 MST

John Deere LT155: JD LT155, sluggish transaxle

Sun, 07 May 2023 15:59:33 -0700

I have a JD LT155 lawn tractor with a Tuff Torq K51b transaxle that works fine in "Forward," but is sluggish/slow/powerless in "Reverse." Has anyone tried to rebuild one of these? TIA!

John Deere D105 lawnmower: Why does my mower die after it’s been running for a few minutes?

Sat, 29 Apr 2023 10:26:18 -0700

I have a John Deere riding mower (E110 series) that will not stay running. We have changed the oil, spark plug, and air filter. We also drained the gas and put new gas in it. It starts up fine, but after running for a few minutes it starts to bog down and dies. Please help, my grass is getting longer by the minute!

⟐ Answer accepted April 29, 2023 at 10:26 MST

John Deere D105 lawnmower: Why does my mower shutoff and backfire when the blades are engaged?

Thu, 06 Apr 2023 16:12:05 -0700

I was cutting grass and had got maybe 150 feet when the mower shut off. When it did it backfired. I tried to cut the mower back on and it worked fine till i engaged the blades then it shut off and backfired again.

⟐ Answered April 06, 2023 at 16:12 MST

John Deere D105 lawnmower: Motor not turning fast enough

Tue, 28 Mar 2023 08:28:01 -0700

John Deere D105 lawnmower starts fine goes forward and reverse without the blade's are not engaged but when engaged the motor stalls and dies ...I checked all the switches...has new drive belt and deck belt on it

.what could it be

⟐ Edited by author March 28, 2023 at 8:28 MST

John Deere 870: 440 front end loader will not raise up or down.

Mon, 27 Mar 2023 14:55:35 -0700

My 440 loader on my JD 870 tractor suddenly stopped going up or down. The cylinders are trying because it will move about 1 inch. I checked and added fluid but still doesn’t work. The John Deere store said it is not necessary to bleed the lines. What else should I look at.

⟐ Commented March 27, 2023 at 14:55 MST

John Deere: Hydro static control arm connection

Thu, 16 Jun 2022 02:11:30 -0700

What does the pin on the motion control arm connect to on the John Deere L 120 hydrostatic transmission that takes it from reverse to forward

John Deere: Oil Spill but on Engine of Ztrak mower

Thu, 02 Jun 2022 09:33:47 -0700

I am new to operating a John Deere Ztrak. I inherited a 2020 Ztrak Z355R. I used it for the first time this past weekend and worked perfectly fine. I noticed the next day there was oil on the floor. After examining the equipment I could not find the source and did not see any obvious breaks/leak source. What was odd about this was the amount of oil surrounding the top of the engine. I am new to the ride on mowers, but this does not seem normal. Should I be concerned this is something to do with inside the mower or as simple as the a cap was loose? I checked the caps and they were all on, but the amount of oil on the engine and underneath was concerning and my thoughts are has to be from a loose cap. I am afraid to use it again in fear additional damage could be done. Any help would be appreciated and/or if this is a bigger issue that I should bring into a dealership/service company to look at. Thanks.

⟐ Commented June 02, 2022 at 9:33 MST

John Deere: My 6210 john deere ford revers lever is not working.

Thu, 03 Jun 2021 16:17:10 -0700

my 6210 john deere tractor ford reverse lever is not working

John Deere: ford and reverse lever is not working.

Thu, 03 Jun 2021 01:41:27 -0700

the ford and reverse lever is not working on my john deere 6210 tracter

John Deere: John Deere D170 riding mower and when I engage the PTO the motor quits

Wed, 13 Jan 2021 11:19:56 -0700

Every time I engage the PTO the motor dies. I take the deck belt off and it runs fine when you engage the PTO. I’ve checked the blades and they are free from debris and I've greased the main pullies. Anyone have this issue please help.

John Deere: on a 4040 jd the streeing wheel flops around when tilled up

Wed, 14 Oct 2020 18:32:04 -0700

on my 4040 jd the streeing wheel flops around when tilled up

John Deere 870: What is the part next to the fuel distributor with oil cap?

Tue, 07 Apr 2020 05:18:33 -0700

There is a part just to the right of the fuel distributor/pump? that has a yellow oil cap on it.

I cannot find this referenced in my manual and it look like it needs oil. What goes in there and what is the level? Also what is it?

Thanks.

John Deere: John Deere Hydro 165 Pulley

Fri, 27 Mar 2020 15:42:14 -0700

When I engage PTO belt and pulleys rotate on deck but the other belt and pulley in front won’t rotate then will kill the mower. What is the front pulley called? Drive or Engine Pulley