Hydrolyzes the glucosidic bonds of unbranched Glc residues in tamarind seed xyloglucan, producing XXXG, XLXG, XXLG and XLLG. May have a dual endo- and exo- mode of action towards xyloglucan, or may have an endo-processive mode of action. Optimum pH is 6.0-6.5. Stable between pH 5.0 and 7.5. Optimum temperature is 60-70 degrees Celsius. Stable up to 55 degrees Celsius. Belongs to the glycosyl hydrolase 74 family.