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    EX60-5 Swing Pinion gear 4397254

    Looking to source an EX60-5 Pinion gear for the swing bearing. It's part of the swing motor gear reduction. Looking to see what kind of aftermarket quality is available. The Hitachi branded piece is $2500. Is there any brand I should stay away from? Sources and business that would stock that...
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    ThreeBond #1102 For bedding Hitachi Swing Bearing

    All, Looking to find an alternative to the Specced' bedding gasket that Hitachi says to use to bed the Swing bearing to the track frame. Threebond #1102. https://www.techsil.co.uk/threebond-1102-200gm It's a non-drying liquid gasket, that is resistant to chemicals including gasoline. It fills...
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    EX60-5 Idler Bearing tolerance in track frame

    Looking to get an opinion on the tolerance for the idler bearing in the track frame. I've got a lot of play right now, and that is likely a good reason for my tracks coming off more frequently. I suspect the best option would be to weld a plate of metal in the track frame vs. weld build up...
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    Aftermarket Rotec Bearing, Slewing Ring for EX60-5

    All, Just looking to get some opinions of the quality of aftermarket swing bearings. A new one from Hitachi is pretty steep, at least 5 times the price of an aftermarket one. I do all my own mechanical work, so labor is not an issue for long term replacement if it would only get half the life...
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    Thought on the Hitachi ZX 135

    I currently have an EX60-5, and feel it's a great little machine. Not too small to do some big work, but not to big to access tighter projects either. I have always had my eye on a bigger machine, and likely thought a Hitachi 120 would be the way to go. Blades are common etc. I often use for...
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    Rates for excavator and tandem dump with 1 operator

    I'm looking to see what common practice is when using an excavator and tandem dump truck onsite with 1 operator. Currently I'm charging $105/hr for an EX60-5, and $105/hr for the tandem dump truck individually. I charge a little more for the tandem as it works almost exclusively on a small...
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    Mack drive hub axle studs pulling threads

    My '77 RS600 seems to be stripping the drive hub studs for the axles. Not sure why this is happening. The Mack dealerships solution was to drill and heli-coil for fine thread bolts. Is this a common issue? Maybe an actual gasket (vs only silicone) between the hub and the axle shaft would...
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    '77 Mack S-Cam Rear Brakes

    1977 Mack RS600L 38k rears Camel Back with S-cam rears. It seems that the brakes in my rear axle in the tandem bogie are wearing way faster then the front tandem axle. I have the service history for the past 8 years and 80k miles. Both sides of the rear changed twice in that time. No brake...
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    Wheel Stud Thread Lubrication

    Just trying to get some perspective on wheel studs and nuts and how everyone deals with the slight rust surface on both stud and nut threads. The super dry contact results in 'jumpy' torquing. ie; there is a lot of friction in the threads, and when torquing the nut, the nut needs a whole lot of...
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    1977 Mack RS600L breaking front wheel studs

    Just picked up a 1977 Mack dump truck. Well maintained, but it seems it has been breaking wheel studs on a regular basis. Both front left and right. Meritor brand studs and nuts. They only lasted around 12 months before one or a few would break off. Any ideas as to what is causing this...
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    Aftermarket Hydraulic Cylinder Seal Kits

    All, Wondering how the aftermarket seal kits fare compared to the OEM. My boom cylinder just started weeping, and want some options. Thanks, Art
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    Good Hydraulic Fluids

    Hello all, I'm about to change my hydraulic fluid in my EX60-5. Looking for a good Hydraulic fluid. The Hitachi 46HN is a little pricey and is a 4000 hr fluid. My take is that a hose rupture could put a lot of fluid on the ground in 4000 hrs and may not be worth it. Is the Hitachi fluid...
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    Swing Bearing, Rotec bearing, Slewing bearing

    Just wondering on the results that machines have had with the aftermarket Swing Bearings? Pricing differences and longevity etc. Thanks
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    Hitachi EX60-5 pulsed air from air filter housing

    Hitachi EX60-5 5700 hrs, has a pulsed air burst from the air filter housing. (intake manifold) The pulse speeds up with RPM. Is this normal for these engines? Do I have a bad valve? Lash set incorrectly? I pulled the oil filler cap to increase the venting of the engine (4 cylinder normal...
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