TBone
Platinum Member
The owners manual specifies 15-50 synthetic (motor) oil in my PM34Z mower in the hydraulic drive system. I discovered that my dealer filled mine with 15-40 NON SYNTHETIC oil (and the cheapest stuff they make at that) /forums/images/graemlins/mad.gif /forums/images/graemlins/mad.gif so I decided to change mine (at 8.3 hours)
I bought a filter from the dealer ($18) and some Mobil 1 15-50 oil from Advance Auto. The filter they sold me has 10 milacrons on the side. The one that came on the mower had 40 milacrons on the side of it.
/forums/images/graemlins/confused.gif /forums/images/graemlins/confused.gif
I'm sure both of these filters were made by some off shore company that Gravely found by price shopping.
My questions:
Which filter is the CORRECT one for this application?
There is no way to get all of the oil out of the system. You can only drain about 1 1/2 quarts at the time. I did this twice and refilled it. I figure this should have diluted the old oil down to about a 1-4 ratio. (3 parts synthetic and 1 part regular) Is this ok?
I am sending these questions to Gravely also but they haven't been the most responsive to emails in the past. They did help me solve a small pto engagement problem I had a while back, but it took quite a while to get an answer and they tend to be very vague with their answers. (Like most manufacturers)
Despite these little bumps in the road, I really like this mower. It gives an excellent cut and is really built well.
Any help you can give me would be much appreciated.
TBone
I bought a filter from the dealer ($18) and some Mobil 1 15-50 oil from Advance Auto. The filter they sold me has 10 milacrons on the side. The one that came on the mower had 40 milacrons on the side of it.
/forums/images/graemlins/confused.gif /forums/images/graemlins/confused.gif
I'm sure both of these filters were made by some off shore company that Gravely found by price shopping.
My questions:
Which filter is the CORRECT one for this application?
There is no way to get all of the oil out of the system. You can only drain about 1 1/2 quarts at the time. I did this twice and refilled it. I figure this should have diluted the old oil down to about a 1-4 ratio. (3 parts synthetic and 1 part regular) Is this ok?
I am sending these questions to Gravely also but they haven't been the most responsive to emails in the past. They did help me solve a small pto engagement problem I had a while back, but it took quite a while to get an answer and they tend to be very vague with their answers. (Like most manufacturers)
Despite these little bumps in the road, I really like this mower. It gives an excellent cut and is really built well.
Any help you can give me would be much appreciated.
TBone