如果是單行走前進無力后退正常，可以考慮故障為： 1、前進側操縱桿（先導閥）故障，二次輸出壓力低； 2、行走主閥芯單向卡滯，換向量小； 3、行走馬達平衡閥卡滯，云南挖機改潛孔鉆，單向換向量小； 4、行走馬達配流盤單側磨損泄漏； 5，云南挖機改潛孔鉆，云南挖機改潛孔鉆、中心回轉接頭處對應主管路密封失效泄漏。 如果是雙行走前進無力后退正常，發生概率較低，可以是以上故障點的雙倍問題。

具體問題具體分析，如何選擇取決空壓機壓力和實際用途。鉆孔是分深度和實際硬度的。高風壓速度快，油耗高，深度深，采購成本大。低風壓速度慢，耗油小，深度淺，相對便宜。 潛孔鉆機： 　　潛孔鑿巖的實質，是在鑿巖過程中使沖擊器潛入孔內，以減小由于釬桿傳遞沖擊功所造成的能量損失，從而減小孔深對鑿巖效率的影響。潛孔鑿巖的鑿巖設備是潛孔鉆機，我國地下礦山常用的有YQ-80、YQ-100及QZ-165等型號，在堅固性系數f=8?14的礦巖中鉆鑿孔徑為80～165毫米的深孔，能獲得較高的鑿巖速度。

井下鉆機：鉆鑿孔徑小于 150毫米的井下炮孔時，除應用鑿巖機外還可應用 80～150毫米的小直徑潛孔鉆。在煤或較軟礦巖中鉆直徑70毫米以下的炮孔時，一般用電力鉆或風鉆，由電動機（或氣動馬達）帶動鉆桿鉆孔，鉆出的巖（煤）屑經鉆桿上的螺旋槽排出。潛孔鉆機在國外的發展 近幾年．國外***的潛孔鉆機制造公司又相繼推出了一系列新產品。如Sanvik的TITONl00型潛孔 履帶式潛孔鉆機，Atlas Copco的ROC L830型潛孔鉆機口’6】。ROC L830型 潛孔鉆機配備了提供氣壓3MPa的壓縮機。裝備了*特的筒形輸送系統，可操作比較大直徑為140mm的 鉆管。 這些設備的共同特點是自動化程度越來越高，部分功能實現智能化i GPS技術在這些鉆機上的應用， 實現了臂架自動定位，節約了現場標記和定位的時間，改善了作業效率，使操縱員能夠集中精力監視鉆孔的進程。同時，更加注重安全和環保以及人機關系的改善。隨著***的發動機排放法規、機動性、智能操縱和環保法規Tier 3/歐ⅢA排放法規的實施影響，大多數國外***鉆機制造公司都采用了符合排放標準的柴油機。

昆明悍之駿工程機械有限公司坐落于美麗的“春城”昆明市，是一家專業生產、銷售挖掘機**屬具的**企業。在挖掘機市場競爭日益激烈的目前，為了能夠幫助廣大用戶實現挖掘機“一機多用、一機多能”，打破挖機功能單一的市場格局，公司在借鑒國內外**技術和理念的同時，不斷創新，致力于擴展挖掘機的應用領域，替代各種功能單一、價格昂貴的**機械，使工程施工具備節能、環保、效率較高、便捷和低成本等優勢，滿足未來施工需求。
唯強悍、敢駿馳，“悍駿”品牌，為本公司相當為**的屬具品牌，多年來，該品牌已得到了廣大用戶一致**！目前公司主營產品類別有:挖斗、破碎錘、挖機改鉆機、抓木（石）器、螺旋鉆機、移動破碎斗、移動篩分斗、銑挖機、振動夯、快速連接器、液壓剪等多種**屬具。“工欲善其事，必先利其器”，每一件屬具，從選材到工藝制作，我們均嚴把質量關，**每一件屬具到用戶手中都能效率較高使用。所以目前無論是一般的建筑施工現場，道路建設與養護、園林綠化，建筑物的拆除，廢舊物資的拆除、分揀、搬運，還是在地震、泥石流、洪澇等自然災害應急搶險工地，我們都能為您提供**的產品及解決方案。

企業文化：自強不息，厚德載物；質量為本、共謀發展。
營銷宗旨：誠信立人、品質立身。
經營理念：與客戶共享成功、與員工共謀發展、與社會共同進步。
Kunming hanzhijun Construction Machinery Co., Ltd. is located in Kunming City, a beautiful “Spring City”. It is a high-tech enterprise specializing in the production and sale of excavator front-end attachments. In today's increasingly fierce competition in the excavator market, in order to help the users realize the "one machine multi-purpose, one machine multi-function" of the excavator, and break the single market pattern of the excavator function, the company draws on the advanced technology and concept at home and abroad, Constantly innovating, we are committed to expanding the application field of excavators, replacing various special-purpose machines with single functions and high prices, so that the engineering construction has the advantages of energy saving, environmental protection, high efficiency, convenience and low cost to meet future construction needs.
Weiqiang, Dajun Chi, "Qi Jun" brand, is the company's most well-known accessory brand. Over the years, the brand has been well received by users! At present, the company's main product categories are: bucket, breaker, digging machine to drill, grab wood (stone), auger, mobile crusher, mobile sieve bucket, milling machine, vibrating jaw, quick connector, hydraulic Cut a variety of front end attachments. "When a worker wants to do something good, he must first sharpen his tools." Every piece of attachment, from material selection to craft production, we strictly control the quality and ensure that each piece can be used efficiently in the hands of users. So today, whether it is a general construction site, road construction and maintenance, landscaping, demolition of buildings, demolition, sorting and transportation of waste materials, or natural disaster emergency sites such as earthquakes, mudslides, floods, etc., we can To provide you with the perfect products and solutions.

Corporate culture: self-improvement, ethics and morality; quality-oriented, and seek common development.
Marketing purposes: integrity and quality, standing.
Business philosophy: share success with customers, seek common development with employees, and make progress together with society.