well, this is using tractor for convenience instead of actual need.
28ft long shed split with entry way between both sections. one section heated with direct vent empire DV55 lpg furnace, other with a master 80k btu kero heater mounted in door with fans to kick hot air through ceiling/roof to heat the main section.
been working well. until it wasn't. heater just over 5yrs old so figure time to do its first yearly mtx. on kero pump supposed to be 3.8 on #2 4psi. was 1.5. problem.
so I hand carried it, just fueled up so vent on cap splashing me plus I am doing construction in shed so MANY obstacles, to main section to work on. did the mtx, cleaned filters, put new rotor in, gapped rotor, cleaned and gapped igniter, etc.
still....1.5 psi.
so pulled hose off pump put finger over nipple turned on, 10psi (had replaced check ball/spring) so knew was hose or nozzle issue. pulled air hose off nozzle and pump, pulled it out completely, where it went thru grommet coming back up in to connect to pump had a 50% split.
3$ of hose fixed it runs 4psi fires w/i 1 second and flame touches end cap w/o going past.
so time to haul it back to other side and mount in door.
this is where GC2400 came into play. tossed into bucket drove over and then down hill raised up and heater was sitting level with mount in door.
shoved in hooked up to power parked tractor.
anyways convoluted way to say if you run heaters and you consider yearly mtx to mean every 5 years AND you got low pressure....check the pump to nozzle hose and use a tractor to lift it
EDIT: oh yeah, I got one more same model I leave under house in case water freezes when -20. guess I should check that
edit 2: proof positive that you can twist MANY situations into a tractor topic