hi, I just bought a new tthp 36". while looking through the manual I came across this. On page 29 under the grease lubrication chart it says "no. 4 & 6 (idler pivots) disassemble and grease once a month under no load condition" I was wondering why you could not just pump fresh grease into them instead of disassembling. and what is the correct procedure for disassembly. the rear one looks like it might be difficult to get to. thanks for any advice!