How do I replace lower boom pins on L175 skid loader

check seal for leaks or air in cylinder try bleeding line

There is usually a secondary switch that needs to be pressed after the lap bar is lowered, its either that or if you have auxillary ports on it the lever for the auxillary ports may be locked on, that will cause sparratic operation also

I am sending you a link from where you will get the Wiring Diagram http://toolsnyou.com/

Possibly just a blown fuse.

If thermostat is replaced for that purpose and did not resolve ur issue that is assuming you took out all the air out of the cooling system/heating Need start from switching mechanism or vacuum or electric on the inside down to ur switching valve from hot to cold to be able to pin point the cause of the heated water not going in to your heating core and make sure your blower is working. Good Luck

press the helpful button and check links below manuals for the 940

http://file.seekpart.com/keywordpdf/2011/3/30/2011330111313348.pdf

Mustang Steer Loader 940 Parts Manual

Misc Tractors Mustang 2040 Skid Steer Loader Manual Service Repair Owners...

mustang 940e skid steer manual special

Wiring Harness for swing boom - Skid Steer Genius

www.skidsteergenius.com/blogs/news/.../wiring-harness-for-swing-boom
Aug 21, 2015 - Posted by Robert Leib in bobcat 7 pin cable for swing boom, CID ... The CID Swing Boom, Prowler Swing Arm & Spartan Articulating Brush ...

WIRING FOR CID brush swing boom - Fixya

www.fixya.com/cars/t26003553-wiring_cid_brush_swing_boom
4 hours ago - WIRING FOR CID brush swing boom - Cars & Trucks question. images for WIRING FOR CID brush swing boom

ive heard of folks doing it without a crane but i would not try it , alignment is too critical with getting guides and stops back in and with nothing to move boom that would be too difficult

anyways: suspend boom end with double straps from crane , disconnect hydraulic/electric swivels/plugs at truck end lift end of boom slightly with boom all the way extended straight out , remove acess panel (both sides) at jct of upper/lower boom section . remove C clip one side drive out pin oppisite side (wiggle boom to clear pin) locate stops in lower section boom end unbolt , slowly pull upper boom with crane away take care of hydraulic lines and electric wires set on floor on wood cribbing , locate bottom of cylinder truck end find C clip and pin Might be behind a trim cover that might need to be remove drive out pin also remove bottom cylinder hyd hose connect crane to cylinder end move out a foot or so remove top cyliinder hydraulic hose then carefully slide out cylinider with crane , Note if your valves are not tight and new oil will leak back and cause boom base to sag when you unhook hydraulic hoses , your gonna need to block this up with wood cribbing just in case

reverse removal process to install new one , also i would not just install a new seal (you can) with out having cylinder recromed I'll bet it's rusty thats what tears the seals up
and allways replace entire oil volume in hydraulics your old seal is in old oil not good for the new one

I'd almost definitely say you're a tooth out on the injector pump by the sound of it, but the manual isn't showing how it's driven.
Have you seen this? http://www.hawkinsequipment.com/gehl-parts-manuals/Engines/Skid-Loader/SL4640-SL4840-SL5640-SL6640-Skid-Loader-Deutz-Engine-Parts-Manual-917108C.pdf

You most likely have a defective hydraulic control valve, I would start the testing there.