I purchased a 1952 WD45 recently and when I was growing up I remember we owned a WD45 with the wide front. When looking to buy my own I came across a unit with a narrow front and decided not to miss out on this opportunity. When I started using the tractor I noticed the oil gauge does not work but it looks relatively new. Since then I have only used the tractor for pulling straw wagons and a bit of bush hogging. When I changed this gauge at idle the tractor runs between 0 and 2psi. When in full throttle it runs at about 15 psi. My question is that why is the pressure this low when idling and what is the standard operating pressures.