74 HT25 - MAINTENANCE OVERVIEW Interval Task Page 10 hours Check coolant level 78 Check track tension 81 Check hydraulic hoses 83 Check fuel filter 76 Check digging chain teeth 86 Check digging chain 86 Check/adjust digging chain tension 87 Check boom mounting bolts 88 Check attachment mounting bolts 88 Check personnel restraint bar bolts 88 50 hours Check fan belt 77 Check air filter 79 Check track sprocket bolts (initial) 82 100 hours Change fuel filter 76 Change in-line fuel filter 76 Check track sprocket bolts 82 Check front idler roller 82 250 hours Change air filter 79 500 hours Replace fan belt 77 2000 hours Change coolant 78 As needed Adjust track tension 81 Check battery 84 Check fuses 84 Replace digging chain 89 p OVERVIEW Interval Task Page Check coolant level 78 Check track tension 81 Check hydraulic hoses 83 Check fuel filter 76 Check digging chain teeth 86 Check digging chain 86 Interval Task Page Check coolant level 78 Check track tension 81 Check hydraulic hoses 83 Check fuel filter 76 Check digging chain teeth 86 Check digging chain 86