Cat Excavator Hydraulic Fluid Sight Glass

Cat Excavator Hydraulic Fluid Sight Glass parts list
Image	Fits Model	Description	Details	Part #	Price	Product Details
	See Details	305.5, 306, 306E, 307C, 307D, 308C, 311C, 312C, 312C L, 314C, 315C, 318C, 319C, 320C, 320C FM, 321C, 322C, 325C, 330B L, 330C, 330C L, 345B II, 345B II MH, 345C, 345C L, 345C MH, 365B, 365B II, 365B L	Hydraulic Tank Sight Gauge		3512955	$38.00	View Info

Hydraulic tank sight glass gauges for Caterpillar excavators, giving operators a clear visual check of hydraulic fluid level without opening the reservoir. Part number 3512955 fits a wide range of C-series and B-series machines.

Fits Models At A Glance

Mini/Compact: 305.5, 306, 306E, 307C, 307D, 308C
311-322 Series: 311C, 312C, 312C L, 314C, 315C, 318C, 319C, 320C, 320C FM, 321C, 322C
325-345 Series: 325C, 330B L, 330C, 330C L, 345B II, 345B II MH, 345C, 345C L, 345C MH
365B Series: 365B, 365B II, 365B L

Key Notes

Application: Mounts on the hydraulic reservoir for fluid level monitoring
Part Number: 3512955 direct-fit replacement
Coverage: Fits mini through large excavator platforms
Shipping: All glass ships to the lower 48 US states only, no international shipping

Why Choose Broken Tractor

✅ Direct-fit sight glass for Cat excavators
✅ Fast shipping from two US warehouses
✅ Broad model coverage across Cat lineups

Frequently Asked Questions

What Cat excavator models does hydraulic tank sight glass 3512955 fit?

Part number 3512955 fits a wide range of Cat excavators, including the 305.5, 306, 306E, 307C, 307D, 308C, 311C, 312C, 312C L, 314C, 315C, 318C, 319C, 320C, 320C FM, 321C, 322C, 325C, 330B L, 330C, 330C L, 345B II, 345B II MH, 345C, 345C L, 345C MH, 365B, 365B II and 365B L. It is a direct-fit replacement across mini through large Cat excavator platforms.

Does the 3512955 sight glass fit a Cat 320C excavator?

Yes, the 3512955 hydraulic tank sight glass is listed to fit the Cat 320C as well as the 320C FM. Fitment can vary by serial number, so match the part number on your old sight glass to 3512955 or confirm with the Broken Tractor parts team by calling (800) 909-7060 before ordering.

Where does the hydraulic fluid sight glass mount on a Cat excavator?

The sight glass mounts on the hydraulic reservoir. It gives the operator a clear visual check of the hydraulic fluid level without having to open the reservoir.

Will the same hydraulic sight glass fit Cat mini excavators like the 305.5 or 308C?

Yes, part number 3512955 fits Cat mini and compact excavators, including the 305.5, 306, 306E, 307C, 307D and 308C. The same part also fits larger Cat models up through the 365B series.

Can a Cat excavator hydraulic sight glass ship outside the lower 48 states?

No, all glass parts, including the 3512955 hydraulic tank sight glass, ship to the lower 48 US states only. Broken Tractor does not offer international shipping on glass, but orders within the lower 48 get fast shipping from two US warehouses.