15-09-2021

Hymac Manual

Hi all,

Here is a brief history of the Hymac company. Production of the first Hymac excavator the 480 which only featured 270 degree slew began in 1962. Between 1962-1966 312 of these were manufactured. The 480 was replaced by the 5/8 cu yd 580 in 1964 versions of this model were prime products of Hymac until 1987 with over 10,000 units sold.


Not been on for a while due to work but have recently been using my hymac 370 to dig out and scrape a few tons of mud and rubble next to one of my sheds. The machine has always been slow and hydraulic pump has screeched a bit but as I was using it the other day the loader started to get very hard to lift, had to give maximum revs to get it to move at all. The pump is whining like hell as well. Steering was non existant unless I on idle and couldnt use the loader and turn the wheel at the same time. Today I pulled off the hydraulic filter that is under the cab, found it to have collapsed so replaced it and topped up oil. Started up and now getting no power to backactor side rams or the stabilisers. Loader wont move unless full revs and then will only move a few inches/stop/few inches/stop.
  • Hymac 580C Spare Parts Catalog Manual Hymac 580C Spare Parts Catalog Manual Complete parts manual covering hymac 580c, good information to refer too, will help you to identify and order spare parts with ease. Model Covered: Hymac 580C This manual is very easy to use, it is designed in PDF format to simply view on your windows pc or mac/tablet.
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  • The Hymac Company established 1946, pioneer of the all hydraulic 360 excavator, located at the Rhynmey Engineering plant in Wales, manufacturing machinery, and assembling the Hy-Hoe Excavator from the Hydraulic Machinery Company of America. Hy-mac UK then went on to design and manufacture its own hydraulic excavators and became a world leader in manufacturing a wide range of Hydraulic.
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Now, I cant get the front hydraulic filter housing off, its solid. Need to get some heavier duty bars to put over the end of my shifter. Will hopefully get that off and changed on friday, I am also going to empty the hydraulic tank and give it a good clean. Question is, does it sounds likely the pump is on the way out? Any idea of a rough cost of refurb/replacement if so? I need it in the next couple of weeks to put drains in and dig out some new trackway so need it fixed ASAP if it is the pump , any ideas would be welcome. (All levers are in nuetral position, pump is slightly noisy when at idle)Hymac Manual
Cheers,

Hymac Maneuver

Iain